diff --git a/app/src/main/assets/windows_timezones.txt b/app/src/main/assets/windows_timezones.txt
deleted file mode 100644
index 884b3f195b..0000000000
--- a/app/src/main/assets/windows_timezones.txt
+++ /dev/null
@@ -1,253 +0,0 @@
-#Country/Region;ISO3166;Timezone;UTC;Timezone description
-Afghanistan;AF;Afghanistan Standard Time;(UTC+04:30);Kabul
-Åland Islands;AX;FLE Standard Time;(UTC+02:00);Helsinki, Kyiv, Riga, Sofia, Tallinn, Vilnius
-Albania;AL;Central Europe Standard Time;(UTC+01:00);Belgrade, Bratislava, Budapest, Ljubljana, Prague
-Algeria;DZ;W. Central Africa Standard Time;(UTC+01:00);West Central Africa
-American Samoa;AS;UTC-11;(UTC-11:00);Coordinated Universal Time-11
-Andorra;AD;W. Europe Standard Time;(UTC+01:00);Amsterdam, Berlin, Bern, Rome, Stockholm, Vienna
-Angola;AO;W. Central Africa Standard Time;(UTC+01:00);West Central Africa
-Anguilla;AI;SA Western Standard Time;(UTC-04:00);Georgetown, La Paz, Manaus, San Juan
-Antarctica;AQ;Pacific SA Standard Time;(UTC-03:00);Santiago
-Antigua and Barbuda;AG;SA Western Standard Time;(UTC-04:00);Georgetown, La Paz, Manaus, San Juan
-Argentina;AR;Argentina Standard Time;(UTC-03:00);City of Buenos Aires
-Armenia;AM;Caucasus Standard Time;(UTC+04:00);Yerevan
-Aruba;AW;SA Western Standard Time;(UTC-04:00);Georgetown, La Paz, Manaus, San Juan
-Australia;AU;AUS Eastern Standard Time;(UTC+10:00);Canberra, Melbourne, Sydney
-Austria;AT;W. Europe Standard Time;(UTC+01:00);Amsterdam, Berlin, Bern, Rome, Stockholm, Vienna
-Azerbaijan;AZ;Azerbaijan Standard Time;(UTC+04:00);Baku
-Bahamas, The;BS;Eastern Standard Time;(UTC-05:00);Eastern Time (US & Canada)
-Bahrain;BH;Arab Standard Time;(UTC+03:00);Kuwait, Riyadh
-Bangladesh;BD;Bangladesh Standard Time;(UTC+06:00);Dhaka
-Barbados;BB;SA Western Standard Time;(UTC-04:00);Georgetown, La Paz, Manaus, San Juan
-Belarus;BY;Belarus Standard Time;(UTC+03:00);Minsk
-Belgium;BE;Romance Standard Time;(UTC+01:00);Brussels, Copenhagen, Madrid, Paris
-Belize;BZ;Central America Standard Time;(UTC-06:00);Central America
-Benin;BJ;W. Central Africa Standard Time;(UTC+01:00);West Central Africa
-Bermuda;BM;Atlantic Standard Time;(UTC-04:00);Atlantic Time (Canada)
-Bhutan;BT;Bangladesh Standard Time;(UTC+06:00);Dhaka
-Bolivarian Republic of Venezuela;VE;Venezuela Standard Time;(UTC-04:30);Caracas
-Bolivia;BO;SA Western Standard Time;(UTC-04:00);Georgetown, La Paz, Manaus, San Juan
-Bonaire, Sint Eustatius and Saba;BQ;SA Western Standard Time;(UTC-04:00);Georgetown, La Paz, Manaus, San Juan
-Bosnia and Herzegovina;BA;Central European Standard Time;(UTC+01:00);Sarajevo, Skopje, Warsaw, Zagreb
-Botswana;BW;South Africa Standard Time;(UTC+02:00);Harare, Pretoria
-Bouvet Island;BV;UTC;(UTC);Coordinated Universal Time
-Brazil;BR;E. South America Standard Time;(UTC-03:00);Brasilia
-British Indian Ocean Territory;IO;Central Asia Standard Time;(UTC+06:00);Nur-Sultan
-Brunei;BN;Singapore Standard Time;(UTC+08:00);Kuala Lumpur, Singapore
-Bulgaria;BG;FLE Standard Time;(UTC+02:00);Helsinki, Kyiv, Riga, Sofia, Tallinn, Vilnius
-Burkina Faso;BF;Greenwich Standard Time;(UTC);Monrovia, Reykjavik
-Burundi;BI;South Africa Standard Time;(UTC+02:00);Harare, Pretoria
-Cabo Verde;CV;Cape Verde Standard Time;(UTC-01:00);Cabo Verde Is.
-Cambodia;KH;SE Asia Standard Time;(UTC+07:00);Bangkok, Hanoi, Jakarta
-Cameroon;CM;W. Central Africa Standard Time;(UTC+01:00);West Central Africa
-Canada;CA;Eastern Standard Time;(UTC-05:00);Eastern Time (US & Canada)
-Cayman Islands;KY;SA Pacific Standard Time;(UTC-05:00);Bogota, Lima, Quito, Rio Branco
-Central African Republic;CF;W. Central Africa Standard Time;(UTC+01:00);West Central Africa
-Chad;TD;W. Central Africa Standard Time;(UTC+01:00);West Central Africa
-Chile;CL;Pacific SA Standard Time;(UTC-03:00);Santiago
-China;CN;China Standard Time;(UTC+08:00);Beijing, Chongqing, Hong Kong SAR, Urumqi
-Christmas Island;CX;SE Asia Standard Time;(UTC+07:00);Bangkok, Hanoi, Jakarta
-Cocos (Keeling) Islands;CC;Myanmar Standard Time;(UTC+06:30);Yangon (Rangoon)
-Colombia;CO;SA Pacific Standard Time;(UTC-05:00);Bogota, Lima, Quito, Rio Branco
-Comoros;KM;E. Africa Standard Time;(UTC+03:00);Nairobi
-Congo;CG;W. Central Africa Standard Time;(UTC+01:00);West Central Africa
-Congo (DRC);CD;W. Central Africa Standard Time;(UTC+01:00);West Central Africa
-Cook Islands;CK;Hawaiian Standard Time;(UTC-10:00);Hawaii
-Costa Rica;CR;Central America Standard Time;(UTC-06:00);Central America
-Côte d'Ivoire;CI;Greenwich Standard Time;(UTC);Monrovia, Reykjavik
-Croatia;HR;Central European Standard Time;(UTC+01:00);Sarajevo, Skopje, Warsaw, Zagreb
-Cuba;CU;Eastern Standard Time;(UTC-05:00);Eastern Time (US & Canada)
-Curaçao;CW;SA Western Standard Time;(UTC-04:00);Georgetown, La Paz, Manaus, San Juan
-Cyprus;CY;E. Europe Standard Time;(UTC+02:00);E. Europe
-Czech Republic;CZ;Central Europe Standard Time;(UTC+01:00);Belgrade, Bratislava, Budapest, Ljubljana, Prague
-Democratic Republic of Timor-Leste;TL;Tokyo Standard Time;(UTC+09:00);Osaka, Sapporo, Tokyo
-Denmark;DK;Romance Standard Time;(UTC+01:00);Brussels, Copenhagen, Madrid, Paris
-Djibouti;DJ;E. Africa Standard Time;(UTC+03:00);Nairobi
-Dominica;DM;SA Western Standard Time;(UTC-04:00);Georgetown, La Paz, Manaus, San Juan
-Dominican Republic;DO;SA Western Standard Time;(UTC-04:00);Georgetown, La Paz, Manaus, San Juan
-Ecuador;EC;SA Pacific Standard Time;(UTC-05:00);Bogota, Lima, Quito, Rio Branco
-Egypt;EG;Egypt Standard Time;(UTC+02:00);Cairo
-El Salvador;SV;Central America Standard Time;(UTC-06:00);Central America
-Equatorial Guinea;GQ;W. Central Africa Standard Time;(UTC+01:00);West Central Africa
-Eritrea;ER;E. Africa Standard Time;(UTC+03:00);Nairobi
-Estonia;EE;FLE Standard Time;(UTC+02:00);Helsinki, Kyiv, Riga, Sofia, Tallinn, Vilnius
-Ethiopia;ET;E. Africa Standard Time;(UTC+03:00);Nairobi
-Falkland Islands;FK;SA Eastern Standard Time;(UTC-03:00);Cayenne, Fortaleza
-Faroe Islands;FO;GMT Standard Time;(UTC);Dublin, Edinburgh, Lisbon, London
-Fiji Islands;FJ;Fiji Standard Time;(UTC+12:00);Fiji
-Finland;FI;FLE Standard Time;(UTC+02:00);Helsinki, Kyiv, Riga, Sofia, Tallinn, Vilnius
-France;FR;Romance Standard Time;(UTC+01:00);Brussels, Copenhagen, Madrid, Paris
-French Guiana;GF;SA Eastern Standard Time;(UTC-03:00);Cayenne, Fortaleza
-French Polynesia;PF;Hawaiian Standard Time;(UTC-10:00);Hawaii
-French Southern and Antarctic Lands;TF;West Asia Standard Time;(UTC+05:00);Ashgabat, Tashkent
-Gabon;GA;W. Central Africa Standard Time;(UTC+01:00);West Central Africa
-Gambia, The;GM;Greenwich Standard Time;(UTC);Monrovia, Reykjavik
-Georgia;GE;Georgian Standard Time;(UTC+04:00);Tbilisi
-Germany;DE;W. Europe Standard Time;(UTC+01:00);Amsterdam, Berlin, Bern, Rome, Stockholm, Vienna
-Ghana;GH;Greenwich Standard Time;(UTC);Monrovia, Reykjavik
-Gibraltar;GI;W. Europe Standard Time;(UTC+01:00);Amsterdam, Berlin, Bern, Rome, Stockholm, Vienna
-Greece;GR;GTB Standard Time;(UTC+02:00);Athens, Bucharest
-Greenland;GL;Greenland Standard Time;(UTC-03:00);Greenland
-Grenada;GD;SA Western Standard Time;(UTC-04:00);Georgetown, La Paz, Manaus, San Juan
-Guadeloupe;GP;SA Western Standard Time;(UTC-04:00);Georgetown, La Paz, Manaus, San Juan
-Guam;GU;West Pacific Standard Time;(UTC+10:00);Guam, Port Moresby
-Guatemala;GT;Central America Standard Time;(UTC-06:00);Central America
-Guernsey;GG;GMT Standard Time;(UTC);Dublin, Edinburgh, Lisbon, London
-Guinea;GN;Greenwich Standard Time;(UTC);Monrovia, Reykjavik
-Guinea-Bissau;GW;Greenwich Standard Time;(UTC);Monrovia, Reykjavik
-Guyana;GY;SA Western Standard Time;(UTC-04:00);Georgetown, La Paz, Manaus, San Juan
-Haiti;HT;Eastern Standard Time;(UTC-05:00);Eastern Time (US & Canada)
-Heard Island and McDonald Islands;HM;Mauritius Standard Time;(UTC+04:00);Port Louis
-Honduras;HN;Central America Standard Time;(UTC-06:00);Central America
-Hong Kong SAR;HK;China Standard Time;(UTC+08:00);Beijing, Chongqing, Hong Kong SAR, Urumqi
-Hungary;HU;Central Europe Standard Time;(UTC+01:00);Belgrade, Bratislava, Budapest, Ljubljana, Prague
-Iceland;IS;Greenwich Standard Time;(UTC);Monrovia, Reykjavik
-India;IN;India Standard Time;(UTC+05:30);Chennai, Kolkata, Mumbai, New Delhi
-Indonesia;ID;SE Asia Standard Time;(UTC+07:00);Bangkok, Hanoi, Jakarta
-Iran;IR;Iran Standard Time;(UTC+03:30);Tehran
-Iraq;IQ;Arabic Standard Time;(UTC+03:00);Baghdad
-Ireland;IE;GMT Standard Time;(UTC);Dublin, Edinburgh, Lisbon, London
-Israel;IL;Israel Standard Time;(UTC+02:00);Middle East
-Italy;IT;W. Europe Standard Time;(UTC+01:00);Amsterdam, Berlin, Bern, Rome, Stockholm, Vienna
-Jamaica;JM;SA Pacific Standard Time;(UTC-05:00);Bogota, Lima, Quito, Rio Branco
-Jan Mayen;SJ;W. Europe Standard Time;(UTC+01:00);Amsterdam, Berlin, Bern, Rome, Stockholm, Vienna
-Japan;JP;Tokyo Standard Time;(UTC+09:00);Osaka, Sapporo, Tokyo
-Jersey;JE;GMT Standard Time;(UTC);Dublin, Edinburgh, Lisbon, London
-Jordan;JO;Jordan Standard Time;(UTC+02:00);Amman
-Kazakhstan;KZ;Central Asia Standard Time;(UTC+06:00);Nur-Sultan
-Kenya;KE;E. Africa Standard Time;(UTC+03:00);Nairobi
-Kiribati;KI;UTC+12;(UTC+12:00);Coordinated Universal Time+12
-Korea;KR;Korea Standard Time;(UTC+09:00);Seoul
-Kosovo;XK;Central European Standard Time;(UTC+01:00);Sarajevo, Skopje, Warsaw, Zagreb
-Kuwait;KW;Arab Standard Time;(UTC+03:00);Kuwait, Riyadh
-Kyrgyzstan;KG;Central Asia Standard Time;(UTC+06:00);Nur-Sultan
-Laos;LA;SE Asia Standard Time;(UTC+07:00);Bangkok, Hanoi, Jakarta
-Latvia;LV;FLE Standard Time;(UTC+02:00);Helsinki, Kyiv, Riga, Sofia, Tallinn, Vilnius
-Lebanon;LB;Middle East Standard Time;(UTC+02:00);Beirut
-Lesotho;LS;South Africa Standard Time;(UTC+02:00);Harare, Pretoria
-Liberia;LR;Greenwich Standard Time;(UTC);Monrovia, Reykjavik
-Libya;LY;E. Europe Standard Time;(UTC+02:00);E. Europe
-Liechtenstein;LI;W. Europe Standard Time;(UTC+01:00);Amsterdam, Berlin, Bern, Rome, Stockholm, Vienna
-Lithuania;LT;FLE Standard Time;(UTC+02:00);Helsinki, Kyiv, Riga, Sofia, Tallinn, Vilnius
-Luxembourg;LU;W. Europe Standard Time;(UTC+01:00);Amsterdam, Berlin, Bern, Rome, Stockholm, Vienna
-Macao SAR;MO;China Standard Time;(UTC+08:00);Beijing, Chongqing, Hong Kong SAR, Urumqi
-Republic of North Macedonia;MK;Central European Standard Time;(UTC+01:00);Sarajevo, Skopje, Warsaw, Zagreb
-Madagascar;MG;E. Africa Standard Time;(UTC+03:00);Nairobi
-Malawi;MW;South Africa Standard Time;(UTC+02:00);Harare, Pretoria
-Malaysia;MY;Singapore Standard Time;(UTC+08:00);Kuala Lumpur, Singapore
-Maldives;MV;West Asia Standard Time;(UTC+05:00);Ashgabat, Tashkent
-Mali;ML;Greenwich Standard Time;(UTC);Monrovia, Reykjavik
-Malta;MT;W. Europe Standard Time;(UTC+01:00);Amsterdam, Berlin, Bern, Rome, Stockholm, Vienna
-Man, Isle of;IM;GMT Standard Time;(UTC);Dublin, Edinburgh, Lisbon, London
-Marshall Islands;MH;UTC+12;(UTC+12:00);Coordinated Universal Time+12
-Martinique;MQ;SA Western Standard Time;(UTC-04:00);Georgetown, La Paz, Manaus, San Juan
-Mauritania;MR;Greenwich Standard Time;(UTC);Monrovia, Reykjavik
-Mauritius;MU;Mauritius Standard Time;(UTC+04:00);Port Louis
-Mayotte;YT;E. Africa Standard Time;(UTC+03:00);Nairobi
-Mexico;MX;Central Standard Time (Mexico);(UTC-06:00);Guadalajara, Mexico City, Monterrey
-Micronesia;FM;West Pacific Standard Time;(UTC+10:00);Guam, Port Moresby
-Moldova;MD;GTB Standard Time;(UTC+02:00);Athens, Bucharest
-Monaco;MC;W. Europe Standard Time;(UTC+01:00);Amsterdam, Berlin, Bern, Rome, Stockholm, Vienna
-Mongolia;MN;Ulaanbaatar Standard Time;(UTC+08:00);Ulaanbaatar
-Montenegro;ME;Central European Standard Time;(UTC+01:00);Sarajevo, Skopje, Warsaw, Zagreb
-Montserrat;MS;SA Western Standard Time;(UTC-04:00);Georgetown, La Paz, Manaus, San Juan
-Morocco;MA;Morocco Standard Time;(UTC);Casablanca
-Mozambique;MZ;South Africa Standard Time;(UTC+02:00);Harare, Pretoria
-Myanmar;MM;Myanmar Standard Time;(UTC+06:30);Yangon (Rangoon)
-Namibia;NA;Namibia Standard Time;(UTC+01:00);Windhoek
-Nauru;NR;UTC+12;(UTC+12:00);Coordinated Universal Time+12
-Nepal;NP;Nepal Standard Time;(UTC+05:45);Kathmandu
-Netherlands;NL;W. Europe Standard Time;(UTC+01:00);Amsterdam, Berlin, Bern, Rome, Stockholm, Vienna
-New Caledonia;NC;Central Pacific Standard Time;(UTC+11:00);Solomon Is., New Caledonia
-New Zealand;NZ;New Zealand Standard Time;(UTC+12:00);Auckland, Wellington
-Nicaragua;NI;Central America Standard Time;(UTC-06:00);Central America
-Niger;NE;W. Central Africa Standard Time;(UTC+01:00);West Central Africa
-Nigeria;NG;W. Central Africa Standard Time;(UTC+01:00);West Central Africa
-Niue;NU;UTC-11;(UTC-11:00);Coordinated Universal Time-11
-Norfolk Island;NF;Central Pacific Standard Time;(UTC+11:00);Solomon Is., New Caledonia
-North Korea;KP;Korea Standard Time;(UTC+09:00);Seoul
-Northern Mariana Islands;MP;West Pacific Standard Time;(UTC+10:00);Guam, Port Moresby
-Norway;NO;W. Europe Standard Time;(UTC+01:00);Amsterdam, Berlin, Bern, Rome, Stockholm, Vienna
-Oman;OM;Arabian Standard Time;(UTC+04:00);Abu Dhabi, Muscat
-Pakistan;PK;Pakistan Standard Time;(UTC+05:00);Islamabad, Karachi
-Palau;PW;Tokyo Standard Time;(UTC+09:00);Osaka, Sapporo, Tokyo
-Palestinian Authority;PS;Egypt Standard Time;(UTC+02:00);Cairo
-Panama;PA;SA Pacific Standard Time;(UTC-05:00);Bogota, Lima, Quito, Rio Branco
-Papua New Guinea;PG;West Pacific Standard Time;(UTC+10:00);Guam, Port Moresby
-Paraguay;PY;Paraguay Standard Time;(UTC-04:00);Asuncion
-Peru;PE;SA Pacific Standard Time;(UTC-05:00);Bogota, Lima, Quito, Rio Branco
-Philippines;PH;Singapore Standard Time;(UTC+08:00);Kuala Lumpur, Singapore
-Pitcairn Islands;PN;Pacific Standard Time;(UTC-08:00);Pacific Time (US & Canada)
-Poland;PL;Central European Standard Time;(UTC+01:00);Sarajevo, Skopje, Warsaw, Zagreb
-Portugal;PT;GMT Standard Time;(UTC);Dublin, Edinburgh, Lisbon, London
-Puerto Rico;PR;SA Western Standard Time;(UTC-04:00);Georgetown, La Paz, Manaus, San Juan
-Qatar;QA;Arab Standard Time;(UTC+03:00);Kuwait, Riyadh
-Reunion;RE;Mauritius Standard Time;(UTC+04:00);Port Louis
-Romania;RO;GTB Standard Time;(UTC+02:00);Athens, Bucharest
-Russia;RU;Russian Standard Time;(UTC+03:00);Moscow, St. Petersburg, Volgograd (RTZ 2)
-Rwanda;RW;South Africa Standard Time;(UTC+02:00);Harare, Pretoria
-Saint Barthélemy;BL;SA Western Standard Time;(UTC-04:00);Georgetown, La Paz, Manaus, San Juan
-Saint Helena, Ascension and Tristan da Cunha;SH;Greenwich Standard Time;(UTC);Monrovia, Reykjavik
-Saint Kitts and Nevis;KN;SA Western Standard Time;(UTC-04:00);Georgetown, La Paz, Manaus, San Juan
-Saint Lucia;LC;SA Western Standard Time;(UTC-04:00);Georgetown, La Paz, Manaus, San Juan
-Saint Martin (French part);MF;SA Western Standard Time;(UTC-04:00);Georgetown, La Paz, Manaus, San Juan
-Saint Pierre and Miquelon;PM;Greenland Standard Time;(UTC-03:00);Greenland
-Saint Vincent and the Grenadines;VC;SA Western Standard Time;(UTC-04:00);Georgetown, La Paz, Manaus, San Juan
-Samoa;WS;Samoa Standard Time;(UTC+13:00);Samoa
-San Marino;SM;W. Europe Standard Time;(UTC+01:00);Amsterdam, Berlin, Bern, Rome, Stockholm, Vienna
-São Tomé and Príncipe;ST;Greenwich Standard Time;(UTC);Monrovia, Reykjavik
-Saudi Arabia;SA;Arab Standard Time;(UTC+03:00);Kuwait, Riyadh
-Senegal;SN;Greenwich Standard Time;(UTC);Monrovia, Reykjavik
-Serbia;RS;Central Europe Standard Time;(UTC+01:00);Belgrade, Bratislava, Budapest, Ljubljana, Prague
-Seychelles;SC;Mauritius Standard Time;(UTC+04:00);Port Louis
-Sierra Leone;SL;Greenwich Standard Time;(UTC);Monrovia, Reykjavik
-Singapore;SG;Singapore Standard Time;(UTC+08:00);Kuala Lumpur, Singapore
-Sint Maarten (Dutch part);SX;SA Western Standard Time;(UTC-04:00);Georgetown, La Paz, Manaus, San Juan
-Slovakia;SK;Central Europe Standard Time;(UTC+01:00);Belgrade, Bratislava, Budapest, Ljubljana, Prague
-Slovenia;SI;Central Europe Standard Time;(UTC+01:00);Belgrade, Bratislava, Budapest, Ljubljana, Prague
-Solomon Islands;SB;Central Pacific Standard Time;(UTC+11:00);Solomon Is., New Caledonia
-Somalia;SO;E. Africa Standard Time;(UTC+03:00);Nairobi
-South Africa;ZA;South Africa Standard Time;(UTC+02:00);Harare, Pretoria
-South Georgia and the South Sandwich Islands;GS;UTC-02;(UTC-02:00);Coordinated Universal Time-02
-South Sudan;SS;E. Africa Standard Time;(UTC+03:00);Nairobi
-Spain;ES;Romance Standard Time;(UTC+01:00);Brussels, Copenhagen, Madrid, Paris
-Sri Lanka;LK;Sri Lanka Standard Time;(UTC+05:30);Sri Jayawardenepura
-Sudan;SD;E. Africa Standard Time;(UTC+03:00);Nairobi
-Suriname;SR;SA Eastern Standard Time;(UTC-03:00);Cayenne, Fortaleza
-Svalbard;SJ;W. Europe Standard Time;(UTC+01:00);Amsterdam, Berlin, Bern, Rome, Stockholm, Vienna
-Swaziland;SZ;South Africa Standard Time;(UTC+02:00);Harare, Pretoria
-Sweden;SE;W. Europe Standard Time;(UTC+01:00);Amsterdam, Berlin, Bern, Rome, Stockholm, Vienna
-Switzerland;CH;W. Europe Standard Time;(UTC+01:00);Amsterdam, Berlin, Bern, Rome, Stockholm, Vienna
-Syria;SY;Syria Standard Time;(UTC+02:00);Damascus
-Taiwan;TW;Taipei Standard Time;(UTC+08:00);Taipei
-Tajikistan;TJ;West Asia Standard Time;(UTC+05:00);Ashgabat, Tashkent
-Tanzania;TZ;E. Africa Standard Time;(UTC+03:00);Nairobi
-Thailand;TH;SE Asia Standard Time;(UTC+07:00);Bangkok, Hanoi, Jakarta
-Togo;TG;Greenwich Standard Time;(UTC);Monrovia, Reykjavik
-Tokelau;TK;Tonga Standard Time;(UTC+13:00);Nuku'alofa
-Tonga;TO;Tonga Standard Time;(UTC+13:00);Nuku'alofa
-Trinidad and Tobago;TT;SA Western Standard Time;(UTC-04:00);Georgetown, La Paz, Manaus, San Juan
-Tunisia;TN;W. Central Africa Standard Time;(UTC+01:00);West Central Africa
-Türkiye;TR;Türkiye Standard Time;(UTC+02:00);Istanbul
-Turkmenistan;TM;West Asia Standard Time;(UTC+05:00);Ashgabat, Tashkent
-Turks and Caicos Islands;TC;Eastern Standard Time;(UTC-05:00);Eastern Time (US & Canada)
-Tuvalu;TV;UTC+12;(UTC+12:00);Coordinated Universal Time+12
-U.S. Minor Outlying Islands;UM;UTC-11;(UTC-11:00);Coordinated Universal Time-11
-Uganda;UG;E. Africa Standard Time;(UTC+03:00);Nairobi
-Ukraine;UA;FLE Standard Time;(UTC+02:00);Helsinki, Kyiv, Riga, Sofia, Tallinn, Vilnius
-United Arab Emirates;AE;Arabian Standard Time;(UTC+04:00);Abu Dhabi, Muscat
-United Kingdom;GB;GMT Standard Time;(UTC);Dublin, Edinburgh, Lisbon, London
-United States;US;Mountain Standard Time;(UTC-07:00);Mountain Time (US & Canada)
-United States;US;Pacific Standard Time;(UTC-08:00);Pacific Time (US & Canada)
-Uruguay;UY;Montevideo Standard Time;(UTC-03:00);Montevideo
-Uzbekistan;UZ;West Asia Standard Time;(UTC+05:00);Ashgabat, Tashkent
-Vanuatu;VU;Central Pacific Standard Time;(UTC+11:00);Solomon Is., New Caledonia
-Vatican City;VA;W. Europe Standard Time;(UTC+01:00);Amsterdam, Berlin, Bern, Rome, Stockholm, Vienna
-Vietnam;VN;SE Asia Standard Time;(UTC+07:00);Bangkok, Hanoi, Jakarta
-Virgin Islands, U.S.;VI;SA Western Standard Time;(UTC-04:00);Georgetown, La Paz, Manaus, San Juan
-Virgin Islands, British;VG;SA Western Standard Time;(UTC-04:00);Georgetown, La Paz, Manaus, San Juan
-Wallis and Futuna;WF;UTC+12;(UTC+12:00);Coordinated Universal Time+12
-Yemen;YE;Arab Standard Time;(UTC+03:00);Kuwait, Riyadh
-Zambia;ZM;South Africa Standard Time;(UTC+02:00);Harare, Pretoria
-Zimbabwe;ZW;South Africa Standard Time;(UTC+02:00);Harare, Pretoria
-#Source:https://learn.microsoft.com/en-us/windows-hardware/manufacture/desktop/default-time-zones?view=windows-11
diff --git a/app/src/main/java/eu/faircode/email/AdapterMessage.java b/app/src/main/java/eu/faircode/email/AdapterMessage.java
index ace5e3532b..7b6c79fcd5 100644
--- a/app/src/main/java/eu/faircode/email/AdapterMessage.java
+++ b/app/src/main/java/eu/faircode/email/AdapterMessage.java
@@ -3693,7 +3693,7 @@ public class AdapterMessage extends RecyclerView.Adapter<AdapterMessage.ViewHold
                 @Override
                 protected ICalendar onExecute(Context context, Bundle args) throws IOException {
                     File file = (File) args.getSerializable("file");
-                    return Biweekly.parse(file).first();
+                    return CalendarHelper.parse(context, file);
                 }
 
                 @Override
@@ -3870,7 +3870,7 @@ public class AdapterMessage extends RecyclerView.Adapter<AdapterMessage.ViewHold
                     for (EntityAttachment attachment : attachments)
                         if (attachment.available && "text/calendar".equals(attachment.getMimeType())) {
                             File file = attachment.getFile(context);
-                            ICalendar icalendar = Biweekly.parse(file).first();
+                            ICalendar icalendar = CalendarHelper.parse(context, file);
                             CalendarScale scale = (icalendar.getCalendarScale() == null
                                     ? CalendarScale.gregorian()
                                     : icalendar.getCalendarScale());
diff --git a/app/src/main/java/eu/faircode/email/CalendarHelper.java b/app/src/main/java/eu/faircode/email/CalendarHelper.java
index ffc3e0f753..1c6879b854 100644
--- a/app/src/main/java/eu/faircode/email/CalendarHelper.java
+++ b/app/src/main/java/eu/faircode/email/CalendarHelper.java
@@ -33,9 +33,8 @@ import androidx.preference.PreferenceManager;
 
 import org.json.JSONObject;
 
-import java.io.BufferedReader;
-import java.io.InputStream;
-import java.io.InputStreamReader;
+import java.io.File;
+import java.io.IOException;
 import java.text.SimpleDateFormat;
 import java.util.Calendar;
 import java.util.Date;
@@ -44,13 +43,14 @@ import java.util.TimeZone;
 
 import biweekly.ICalVersion;
 import biweekly.ICalendar;
-import biweekly.component.ICalComponent;
 import biweekly.component.VAlarm;
 import biweekly.component.VEvent;
+import biweekly.io.ParseWarning;
 import biweekly.io.TimezoneAssignment;
 import biweekly.io.TimezoneInfo;
 import biweekly.io.WriteContext;
 import biweekly.io.scribe.property.RecurrenceRuleScribe;
+import biweekly.io.text.ICalReader;
 import biweekly.parameter.ParticipationStatus;
 import biweekly.property.Action;
 import biweekly.property.Attendee;
@@ -82,6 +82,17 @@ public class CalendarHelper {
         return Helper.getTimeInstance(context, SimpleDateFormat.SHORT).format(cal.getTime());
     }
 
+    static ICalendar parse(Context context, File file) throws IOException {
+        try (ICalReader reader = new ICalReader(file)) {
+            ICalendar icalendar = reader.readNext();
+
+            for (ParseWarning warning : reader.getWarnings())
+                Log.i("Event warning " + warning);
+
+            return icalendar;
+        }
+    }
+
     static Long exists(Context context, String selectedAccount, String selectedName, String uid) {
         ContentResolver resolver = context.getContentResolver();
         try (Cursor cursor = resolver.query(CalendarContract.Events.CONTENT_URI,
@@ -148,34 +159,6 @@ public class CalendarHelper {
         String tzid = (tz == null ? null : tz.getID());
         if (tzid == null)
             tzid = TimeZone.getDefault().getID();
-        else
-            try (InputStream is = context.getAssets().open("windows_timezones.txt")) {
-                BufferedReader br = new BufferedReader(new InputStreamReader((is)));
-                String line;
-                while ((line = br.readLine()) != null) {
-                    if (line.startsWith("#"))
-                        continue;
-
-                    String[] info = line.split(";");
-                    if (info.length != 5)
-                        continue;
-
-                    if (!info[2].equalsIgnoreCase(tzid))
-                        continue;
-
-                    // Austria;AT;W. Europe Standard Time;(UTC+01:00);Amsterdam, Berlin, Bern, Rome, Stockholm, Vienna
-                    String utc = info[3]
-                            .replace("UTC", "GMT")
-                            .replace("(", "")
-                            .replace(")", "");
-                    String _tzid = TimeZone.getTimeZone(utc).getID();
-                    EntityLog.log(context, "Event map " + tzid + " to " + _tzid + " " + info[3]);
-                    tz.setID(_tzid);
-                    break;
-                }
-            } catch (Throwable ex) {
-                Log.e(ex);
-            }
 
         String rrule = null;
         RecurrenceRule recurrence = event.getRecurrenceRule();
diff --git a/app/src/main/java/eu/faircode/email/FragmentCompose.java b/app/src/main/java/eu/faircode/email/FragmentCompose.java
index c3c5f36924..7d4aaf2ae8 100644
--- a/app/src/main/java/eu/faircode/email/FragmentCompose.java
+++ b/app/src/main/java/eu/faircode/email/FragmentCompose.java
@@ -5985,7 +5985,7 @@ public class FragmentCompose extends FragmentBase {
                         Helper.copy(ics, file);
                         ics.delete();
 
-                        ICalendar icalendar = Biweekly.parse(file).first();
+                        ICalendar icalendar = CalendarHelper.parse(context, file);
                         VEvent event = icalendar.getEvents().get(0);
                         Organizer organizer = event.getOrganizer();
                         if (organizer != null) {
diff --git a/app/src/main/java/eu/faircode/email/FragmentMessages.java b/app/src/main/java/eu/faircode/email/FragmentMessages.java
index 6a06d13b13..c4cc1fc4ed 100644
--- a/app/src/main/java/eu/faircode/email/FragmentMessages.java
+++ b/app/src/main/java/eu/faircode/email/FragmentMessages.java
@@ -235,7 +235,6 @@ import javax.mail.Session;
 import javax.mail.internet.InternetAddress;
 import javax.mail.internet.MimeMessage;
 
-import biweekly.Biweekly;
 import biweekly.ICalendar;
 import biweekly.component.VEvent;
 import biweekly.property.Status;
@@ -10070,7 +10069,7 @@ public class FragmentMessages extends FragmentBase
                 if (calendar == null)
                     return null;
 
-                ICalendar icalendar = Biweekly.parse(calendar.getFile(context)).first();
+                ICalendar icalendar = CalendarHelper.parse(context, calendar.getFile(context));
                 VEvent event = icalendar.getEvents().get(0);
 
                 int status = CalendarContract.Events.STATUS_TENTATIVE;
diff --git a/app/src/main/java/eu/faircode/email/MessageHelper.java b/app/src/main/java/eu/faircode/email/MessageHelper.java
index d9ad11d275..e8a2686d21 100644
--- a/app/src/main/java/eu/faircode/email/MessageHelper.java
+++ b/app/src/main/java/eu/faircode/email/MessageHelper.java
@@ -155,7 +155,6 @@ import javax.mail.internet.MimeUtility;
 import javax.mail.internet.ParameterList;
 import javax.mail.internet.ParseException;
 
-import biweekly.Biweekly;
 import biweekly.ICalendar;
 import biweekly.component.VEvent;
 import biweekly.property.Method;
@@ -1360,7 +1359,7 @@ public class MessageHelper {
             if (attachment.available &&
                     "text/calendar".equals(attachment.type)) {
                 File file = attachment.getFile(context);
-                ICalendar icalendar = Biweekly.parse(file).first();
+                ICalendar icalendar = CalendarHelper.parse(context, file);
                 Method method = (icalendar == null ? null : icalendar.getMethod());
                 if (method != null && method.isReply()) {
                     // https://www.rfc-editor.org/rfc/rfc6047#section-2.4
@@ -4441,7 +4440,7 @@ public class MessageHelper {
                 boolean ical_tentative = prefs.getBoolean("ical_tentative", true);
 
                 File file = local.getFile(context);
-                ICalendar icalendar = Biweekly.parse(file).first();
+                ICalendar icalendar = CalendarHelper.parse(context, file);
 
                 Method method = icalendar.getMethod();
                 VEvent event = icalendar.getEvents().get(0);
diff --git a/app/src/main/java/eu/faircode/email/ServiceSend.java b/app/src/main/java/eu/faircode/email/ServiceSend.java
index 48d1147b89..c644ffb260 100644
--- a/app/src/main/java/eu/faircode/email/ServiceSend.java
+++ b/app/src/main/java/eu/faircode/email/ServiceSend.java
@@ -74,7 +74,6 @@ import javax.mail.Session;
 import javax.mail.internet.InternetAddress;
 import javax.mail.internet.MimeMessage;
 
-import biweekly.Biweekly;
 import biweekly.ICalendar;
 import biweekly.component.VEvent;
 import biweekly.property.Method;
@@ -962,7 +961,7 @@ public class ServiceSend extends ServiceBase implements SharedPreferences.OnShar
             if ("text/calendar".equals(attachment.type))
                 try {
                     File ics = attachment.getFile(this);
-                    ICalendar icalendar = Biweekly.parse(ics).first();
+                    ICalendar icalendar = CalendarHelper.parse(ServiceSend.this, ics);
 
                     Method method = icalendar.getMethod();
                     if (method == null || !method.isReply())