diff --git a/app/src/main/res/values-cs/strings.xml b/app/src/main/res/values-cs/strings.xml
index 74db478ae..0520b897f 100644
--- a/app/src/main/res/values-cs/strings.xml
+++ b/app/src/main/res/values-cs/strings.xml
@@ -1,284 +1,284 @@
 <resources>
     <string name="app_name">Simple Calendar</string>
     <string name="app_launcher_name">Calendar</string>
-    <string name="change_view">Change view</string>
-    <string name="weekly_view">Weekly view</string>
-    <string name="monthly_view">Monthly view</string>
-    <string name="yearly_view">Yearly view</string>
-    <string name="simple_event_list">Simple event list</string>
-    <string name="no_upcoming_events">Seems like you don\'t have any upcoming events.</string>
-    <string name="add_some_events">You can add some with the Plus button at the bottom.</string>
-    <string name="details">Details</string>
-    <string name="go_to_today">Go to today</string>
-    <string name="no_app_for_ics">No app capable of handling .ics files has been found</string>
+    <string name="change_view">Změnit zobrazení</string>
+    <string name="weekly_view">Týdenní kalendář</string>
+    <string name="monthly_view">Měsíční kalendář</string>
+    <string name="yearly_view">Roční kalendář</string>
+    <string name="simple_event_list">Jednoduchý seznam událostí</string>
+    <string name="no_upcoming_events">Nemáte žádné nadcházející události.</string>
+    <string name="add_some_events">Přidejte událost tlačítkem Plus dole.</string>
+    <string name="details">Detaily</string>
+    <string name="go_to_today">Přejít na dnešek</string>
+    <string name="no_app_for_ics">Žádná aplikace schopná pracovat s příponami .ics nebyla nalezena</string>
     <string name="snooze">Snooze</string>
 
     <!-- Widget titles -->
-    <string name="widget_monthly">Calendar monthly</string>
-    <string name="widget_list">Calendar event list</string>
+    <string name="widget_monthly">Měsíční kalendář</string>
+    <string name="widget_list">Seznam událostí</string>
 
     <!-- Event -->
-    <string name="event">Event</string>
-    <string name="edit_event">Edit Event</string>
-    <string name="new_event">New Event</string>
-    <string name="title_empty">Title cannot be empty</string>
-    <string name="end_before_start">The event cannot end earlier than it starts</string>
-    <string name="event_added">Event added successfully</string>
-    <string name="past_event_added">Event in the past added successfully</string>
-    <string name="event_updated">Event updated successfully</string>
-    <string name="filter">Filter</string>
-    <string name="filter_events_by_type">Filter events by type</string>
+    <string name="event">Událost</string>
+    <string name="edit_event">Upravit událost</string>
+    <string name="new_event">Nová událost</string>
+    <string name="title_empty">Doplňte název</string>
+    <string name="end_before_start">Konec události nemůže být dříve než začátek</string>
+    <string name="event_added">Událost úspěšně přidána</string>
+    <string name="past_event_added">Předchozí událost úspěšně přidána</string>
+    <string name="event_updated">Událost úspěšně změněna</string>
+    <string name="filter">Filtrovat</string>
+    <string name="filter_events_by_type">Filtrovat události podle typu</string>
 
     <!-- Event Repetition -->
-    <string name="repetition">Repetition</string>
-    <string name="no_repetition">No repetition</string>
-    <string name="daily">Daily</string>
-    <string name="weekly">Weekly</string>
-    <string name="monthly">Monthly</string>
-    <string name="yearly">Yearly</string>
-    <string name="weeks_raw">weeks</string>
-    <string name="months_raw">months</string>
-    <string name="years_raw">years</string>
-    <string name="repeat_till">Repeat till</string>
-    <string name="forever">Forever</string>
-    <string name="event_is_repeatable">The event is repeatable</string>
-    <string name="selection_contains_repetition">The selection contains repeating events</string>
-    <string name="delete_one_only">Delete the selected occurrence only</string>
-    <string name="delete_all_occurrences">Delete all occurrences</string>
-    <string name="update_one_only">Update the selected occurrence only</string>
-    <string name="update_all_occurrences">Update all occurrences</string>
-    <string name="repeat_till_date">Repeat till a date</string>
-    <string name="repeat_x_times">Repeat x times</string>
-    <string name="repeat_forever">Repeat forever</string>
-    <string name="times">times</string>
-    <string name="repeat">Repeat</string>
-    <string name="repeat_on">Repeat on</string>
-    <string name="every_day">Every day</string>
-    <string name="selected_days">On selected days</string>
-    <string name="the_same_day">The same day</string>
-    <string name="the_last_day">The last day</string>
-    <string name="repeat_on_the_same_day">Repeat on the same day each month</string>
-    <string name="repeat_on_the_last_day">Repeat on the last day of the month</string>
-    <string name="repeat_every_m">Repeat every</string>
-    <string name="every_m">Every</string>
-    <string name="first_m">first</string>
-    <string name="second_m">second</string>
-    <string name="third_m">third</string>
-    <string name="fourth_m">fourth</string>
-    <string name="last_m">last</string>
+    <string name="repetition">Opakovaná událost</string>
+    <string name="no_repetition">Neopakuje se</string>
+    <string name="daily">každý den</string>
+    <string name="weekly">každý týden</string>
+    <string name="monthly">každý měsíc</string>
+    <string name="yearly">každý rok</string>
+    <string name="weeks_raw">týdny</string>
+    <string name="months_raw">měsíce</string>
+    <string name="years_raw">roky</string>
+    <string name="repeat_till">Opakovat do</string>
+    <string name="forever">Opakovat navždy</string>
+    <string name="event_is_repeatable">Událost se opakuje</string>
+    <string name="selection_contains_repetition">Výběr zahrnuje opakující se události</string>
+    <string name="delete_one_only">Vymazet pouze vybrané výskyty</string>
+    <string name="delete_all_occurrences">Vymazet všechny výskyty</string>
+    <string name="update_one_only">Změnit pouze vybrané výskyty</string>
+    <string name="update_all_occurrences">Změnit všechny výskyty</string>
+    <string name="repeat_till_date">Opakovat až do</string>
+    <string name="repeat_x_times">Opakovat x krát</string>
+    <string name="repeat_forever">Opakovat navždy</string>
+    <string name="times">krát</string>
+    <string name="repeat">Opakovat</string>
+    <string name="repeat_on">Opakovat</string>
+    <string name="every_day">každý den</string>
+    <string name="selected_days">ve zvolené dny</string>
+    <string name="the_same_day">ve stejný den</string>
+    <string name="the_last_day">poslední den</string>
+    <string name="repeat_on_the_same_day">Opakovat ve stejný den každý měsíc</string>
+    <string name="repeat_on_the_last_day">Opakovat poslední den v měsíci</string>
+    <string name="repeat_every_m">Opakovat každý</string>
+    <string name="every_m">každý</string>
+    <string name="first_m">první</string>
+    <string name="second_m">druhý</string>
+    <string name="third_m">třetí</string>
+    <string name="fourth_m">čtvrtý</string>
+    <string name="last_m">poslední</string>
 
     <!-- alternative versions for some languages, use the same translations if you are not sure what this means -->
     <!-- used in repetition, like "Every first Sunday" -->
-    <string name="repeat_every_f">Repeat every</string>
-    <string name="every_f">Every</string>
-    <string name="first_f">first</string>
-    <string name="second_f">second</string>
-    <string name="third_f">third</string>
-    <string name="fourth_f">fourth</string>
-    <string name="last_f">last</string>
+    <string name="repeat_every_f">Opakovat každý</string>
+    <string name="every_f">každý</string>
+    <string name="first_f">první</string>
+    <string name="second_f">druhý</string>
+    <string name="third_f">třetí</string>
+    <string name="fourth_f">čtvrtý</string>
+    <string name="last_f">poslední</string>
 
     <plurals name="days">
-        <item quantity="one">%1$d day</item>
-        <item quantity="other">%1$d days</item>
+        <item quantity="one">%1$d den</item>
+        <item quantity="other">%1$d dní</item>
     </plurals>
 
     <plurals name="weeks">
-        <item quantity="one">%1$d week</item>
-        <item quantity="other">%1$d weeks</item>
+        <item quantity="one">%1$d týden</item>
+        <item quantity="other">%1$d týdnů</item>
     </plurals>
 
     <plurals name="months">
-        <item quantity="one">%1$d month</item>
-        <item quantity="other">%1$d months</item>
+        <item quantity="one">%1$d měsíc</item>
+        <item quantity="other">%1$d měsíců</item>
     </plurals>
 
     <plurals name="years">
-        <item quantity="one">%1$d year</item>
-        <item quantity="other">%1$d years</item>
+        <item quantity="one">%1$d rok</item>
+        <item quantity="other">%1$d roků</item>
     </plurals>
 
     <!-- Event Reminders -->
-    <string name="reminder">Reminder</string>
-    <string name="no_reminder">No reminder</string>
-    <string name="at_start">At start</string>
-    <string name="custom">Custom</string>
-    <string name="before">before</string>
-    <string name="minutes_raw">minutes</string>
-    <string name="hours_raw">hours</string>
-    <string name="days_raw">days</string>
-    <string name="add_another_reminder">Add another reminder</string>
+    <string name="reminder">Připomenutí</string>
+    <string name="no_reminder">Žádné připomenutí</string>
+    <string name="at_start">na začátku</string>
+    <string name="custom">uživatelsky</string>
+    <string name="before">před</string>
+    <string name="minutes_raw">minut</string>
+    <string name="hours_raw">hodin</string>
+    <string name="days_raw">dnů</string>
+    <string name="add_another_reminder">Přidat další připomenutí</string>
 
     <plurals name="minutes_before">
-        <item quantity="one">%1$d minute before</item>
-        <item quantity="other">%1$d minutes before</item>
+        <item quantity="one">před %1$d minutou</item>
+        <item quantity="other">před %1$d minutami</item>
     </plurals>
 
     <plurals name="hours_before">
-        <item quantity="one">%1$d hour before</item>
-        <item quantity="other">%1$d hours before</item>
+        <item quantity="one">před %1$d hodinou</item>
+        <item quantity="other">před %1$d hodinami</item>
     </plurals>
 
     <plurals name="days_before">
-        <item quantity="one">%1$d day before</item>
-        <item quantity="other">%1$d days before</item>
+        <item quantity="one">před %1$d dnem</item>
+        <item quantity="other">před %1$d dny</item>
     </plurals>
 
     <!-- Export / Import -->
-    <string name="importing">Importing&#8230;</string>
-    <string name="exporting">Exporting&#8230;</string>
-    <string name="import_events">Import events</string>
-    <string name="export_events">Export events</string>
-    <string name="import_events_from_ics">Import events from an .ics file</string>
-    <string name="export_events_to_ics">Export events to an .ics file</string>
-    <string name="events_imported_successfully">Events have been imported successfully</string>
-    <string name="events_exported_successfully">Events have been exported successfully</string>
-    <string name="importing_events_failed">Importing events failed</string>
-    <string name="exporting_events_failed">Exporting events failed</string>
-    <string name="importing_some_events_failed">Importing some events failed</string>
-    <string name="exporting_some_events_failed">Exporting some events failed</string>
-    <string name="invalid_file_format">Invalid file format</string>
-    <string name="default_event_type">Default event type</string>
-    <string name="no_events_for_exporting">No events for exporting have been found</string>
-    <string name="export_past_events_too">Export past events too</string>
-    <string name="include_event_types">Include event types</string>
-    <string name="filename_without_ics">Filename (without .ics)</string>
-    <string name="no_title">No title</string>
+    <string name="importing">Importování&#8230;</string>
+    <string name="exporting">Exportování&#8230;</string>
+    <string name="import_events">Import událostí</string>
+    <string name="export_events">Export událostí</string>
+    <string name="import_events_from_ics">Importovat kalendář ze souboru .ics</string>
+    <string name="export_events_to_ics">Exportovat kalendář do souboru .ics</string>
+    <string name="events_imported_successfully">Kalendář byl importován úspěšně</string>
+    <string name="events_exported_successfully">Kalendář byl exportován úspěšně</string>
+    <string name="importing_events_failed">Import kalendáře se nezdařil</string>
+    <string name="exporting_events_failed">Export kalendáře se nezdařil</string>
+    <string name="importing_some_events_failed">Import některých událostí se nezdařil</string>
+    <string name="exporting_some_events_failed">Export některých událostí se nezdařil</string>
+    <string name="invalid_file_format">Neplatný formát souboru</string>
+    <string name="default_event_type">Defaultní typ události</string>
+    <string name="no_events_for_exporting">Nebyly nalezeny žádné události pro export</string>
+    <string name="export_past_events_too">Export i minulých událostí</string>
+    <string name="include_event_types">Zahrnout typy událostí</string>
+    <string name="filename_without_ics">Název souboru (bez .ics)</string>
+    <string name="no_title">Bez názvu</string>
 
     <!-- Event details -->
-    <string name="title">Title</string>
-    <string name="description">Description</string>
-    <string name="all_day">All-day</string>
+    <string name="title">Název</string>
+    <string name="description">Popis</string>
+    <string name="all_day">Celý den</string>
 
     <!-- Weekly view -->
-    <string name="week">Week</string>
+    <string name="week">Týden</string>
 
     <!-- Event types -->
-    <string name="event_types">Event types</string>
-    <string name="add_new_type">Add a new type</string>
-    <string name="edit_type">Edit type</string>
-    <string name="type_already_exists">Type with this title already exists</string>
-    <string name="color">Color</string>
-    <string name="regular_event">Regular event</string>
-    <string name="cannot_delete_default_type">Default event type cannot be deleted</string>
-    <string name="select_event_type">Select an event type</string>
-    <string name="move_events_into_default">Move affected events into the default event type</string>
-    <string name="remove_affected_events">Permanently remove affected events</string>
-    <string name="unsync_caldav_calendar">To remove a CalDAV calendar you have to unsynchronize it</string>
+    <string name="event_types">Typ události</string>
+    <string name="add_new_type">Přidat nový typ</string>
+    <string name="edit_type">Upravit typ</string>
+    <string name="type_already_exists">Typ s tímto názvem již existuje</string>
+    <string name="color">Barva</string>
+    <string name="regular_event">Pravidelná událost</string>
+    <string name="cannot_delete_default_type">Výchozí typ události nelze odstranit</string>
+    <string name="select_event_type">Vyberte typ události</string>
+    <string name="move_events_into_default">Přesunout vybrané události na výchozí typ události</string>
+    <string name="remove_affected_events">Trvale odebrat vybrané události</string>
+    <string name="unsync_caldav_calendar">Chcete-li odebrat kalendář CalDAV, musíte jej desynchronizovat</string>
 
     <!-- Holidays -->
-    <string name="holidays">Holidays</string>
-    <string name="add_holidays">Add holidays</string>
-    <string name="national_holidays">National holidays</string>
-    <string name="religious_holidays">Religious holidays</string>
-    <string name="holidays_imported_successfully">Holidays have been successfully imported into a new event type</string>
-    <string name="importing_some_holidays_failed">Importing some events failed</string>
-    <string name="importing_holidays_failed">Importing holidays failed</string>
+    <string name="holidays">Svátky</string>
+    <string name="add_holidays">Přidat svátek</string>
+    <string name="national_holidays">Státní svátky</string>
+    <string name="religious_holidays">Církevní svátky</string>
+    <string name="holidays_imported_successfully">Svátky byly úspěšně importovány do nového typu události</string>
+    <string name="importing_some_holidays_failed">Import některých událostí se nezdařil</string>
+    <string name="importing_holidays_failed">Import svátků nezdařil</string>
 
     <!-- Settings -->
-    <string name="manage_event_types">Manage event types</string>
-    <string name="use_24_hour_format">Use 24-hour format</string>
-    <string name="sunday_first">Sunday as first day</string>
-    <string name="start_day_at">Start day at</string>
-    <string name="end_day_at">End day at</string>
-    <string name="week_numbers">Show week numbers</string>
-    <string name="vibrate">Vibrate on reminder notification</string>
-    <string name="reminder_sound">Reminder sound</string>
-    <string name="default_event_reminder">Default event reminder</string>
-    <string name="no_ringtone_picker">No app capable of setting ringtone found</string>
-    <string name="no_ringtone_selected">None</string>
-    <string name="day_end_before_start">The day cannot end earlier than it starts</string>
+    <string name="manage_event_types">Správa typů událostí</string>
+    <string name="use_24_hour_format">24h formát</string>
+    <string name="sunday_first">Neděle jako první den</string>
+    <string name="start_day_at">Počátek dne v</string>
+    <string name="end_day_at">Konec dne v</string>
+    <string name="week_numbers">Zobrazovat číslo týdne</string>
+    <string name="vibrate">Vibrovat</string>
+    <string name="reminder_sound">Tón oznámení</string>
+    <string name="default_event_reminder">Standardní připomenutí události</string>
+    <string name="no_ringtone_picker">Nebyla nalezena žádná aplikace, která by mohla nastavit vyzvánění</string>
+    <string name="no_ringtone_selected">žádný</string>
+    <string name="day_end_before_start">Den nemúže skončit dřív, než začne</string>
     <string name="caldav_sync">CalDAV sync</string>
-    <string name="event_lists">Event lists</string>
-    <string name="display_past_events">Display events from the past</string>
-    <string name="snooze_delay">Postpone reminder with Snooze by</string>
-    <string name="widgets">Widgets</string>
+    <string name="event_lists">Seznamy událostí</string>
+    <string name="display_past_events">Zobrazit minulé události</string>
+    <string name="snooze_delay">Odložit připomenutí pomocí funkce Snooze by</string>
+    <string name="widgets">Widgety</string>
 
     <!-- CalDAV sync -->
     <string name="caldav">CalDAV</string>
-    <string name="select_caldav_calendars">Select calendars to sync</string>
-    <string name="manage_synced_calendars">Manage synced calendars</string>
-    <string name="store_locally_only">Store locally only</string>
-    <string name="refresh_caldav_calendars">Refresh CalDAV calendars</string>
-    <string name="refreshing">Refreshing…</string>
-    <string name="refreshing_complete">Refreshing complete</string>
-    <string name="editing_calendar_failed">Editing calendar failed</string>
+    <string name="select_caldav_calendars">Vybrat kalendáře k synchronizaci</string>
+    <string name="manage_synced_calendars">Správa synchronizovaných kalendářů</string>
+    <string name="store_locally_only">Uložit pouze lokálně</string>
+    <string name="refresh_caldav_calendars">Obnovit CalDAV kalendáře</string>
+    <string name="refreshing">Obnovuji…</string>
+    <string name="refreshing_complete">Obnovování dokončeno</string>
+    <string name="editing_calendar_failed">Editování kalendáře se nezdařilo</string>
 
     <plurals name="by_minutes">
-        <item quantity="one">%1$d minute</item>
-        <item quantity="other">%1$d minutes</item>
+        <item quantity="one">%1$d minuta</item>
+        <item quantity="other">%1$d minuty</item>
     </plurals>
 
     <plurals name="by_hours">
-        <item quantity="one">%1$d hour</item>
-        <item quantity="other">%1$d hours</item>
+        <item quantity="one">%1$d hodina</item>
+        <item quantity="other">%1$d hodiny</item>
     </plurals>
 
-    <string name="never">Never</string>
+    <string name="never">Nikdy</string>
 
-    <string name="january">January</string>
-    <string name="february">February</string>
-    <string name="march">March</string>
-    <string name="april">April</string>
-    <string name="may">May</string>
-    <string name="june">June</string>
-    <string name="july">July</string>
-    <string name="august">August</string>
-    <string name="september">September</string>
-    <string name="october">October</string>
-    <string name="november">November</string>
-    <string name="december">December</string>
+    <string name="january">leden</string>
+    <string name="february">únor</string>
+    <string name="march">březen</string>
+    <string name="april">duben</string>
+    <string name="may">květen</string>
+    <string name="june">červen</string>
+    <string name="july">červenec</string>
+    <string name="august">srpen</string>
+    <string name="september">září</string>
+    <string name="october">říjen</string>
+    <string name="november">listopad</string>
+    <string name="december">prosinec</string>
 
-    <string name="monday_letter">M</string>
-    <string name="tuesday_letter">T</string>
-    <string name="wednesday_letter">W</string>
-    <string name="thursday_letter">T</string>
-    <string name="friday_letter">F</string>
+    <string name="monday_letter">P</string>
+    <string name="tuesday_letter">Ú</string>
+    <string name="wednesday_letter">S</string>
+    <string name="thursday_letter">Č</string>
+    <string name="friday_letter">P</string>
     <string name="saturday_letter">S</string>
-    <string name="sunday_letter">S</string>
+    <string name="sunday_letter">N</string>
 
-    <string name="monday">Monday</string>
-    <string name="tuesday">Tuesday</string>
-    <string name="wednesday">Wednesday</string>
-    <string name="thursday">Thursday</string>
-    <string name="friday">Friday</string>
-    <string name="saturday">Saturday</string>
-    <string name="sunday">Sunday</string>
+    <string name="monday">Pondělí</string>
+    <string name="tuesday">Úterý</string>
+    <string name="wednesday">Středa</string>
+    <string name="thursday">Čtvrtek</string>
+    <string name="friday">Pátek</string>
+    <string name="saturday">Sobota</string>
+    <string name="sunday">Neděle</string>
 
     <!-- alternative versions for some languages, use the same translations if you are not sure what this means -->
     <!-- used in repetition, like "Every last Sunday" -->
-    <string name="monday_alt">Monday</string>
-    <string name="tuesday_alt">Tuesday</string>
-    <string name="wednesday_alt">Wednesday</string>
-    <string name="thursday_alt">Thursday</string>
-    <string name="friday_alt">Friday</string>
-    <string name="saturday_alt">Saturday</string>
-    <string name="sunday_alt">Sunday</string>
+    <string name="monday_alt">Pondělí</string>
+    <string name="tuesday_alt">Úterý</string>
+    <string name="wednesday_alt">Středa</string>
+    <string name="thursday_alt">Čtvrtek</string>
+    <string name="friday_alt">Pátek</string>
+    <string name="saturday_alt">Sobota</string>
+    <string name="sunday_alt">Neděle</string>
 
     <!-- List widget config example events -->
-    <string name="sample_title_1">Workout</string>
+    <string name="sample_title_1">cvičení</string>
     <string name="sample_description_1">Leg day</string>
-    <string name="sample_title_2">Meeting with John</string>
-    <string name="sample_description_2">In Rockstone garden</string>
-    <string name="sample_title_3">Library</string>
-    <string name="sample_title_4">Lunch with Mary</string>
-    <string name="sample_description_4">In the Plaza</string>
-    <string name="sample_title_5">Coffee time</string>
+    <string name="sample_title_2">Schůzka s Janem</string>
+    <string name="sample_description_2">v restauraci</string>
+    <string name="sample_title_3">knihovna</string>
+    <string name="sample_title_4">Oběd s Marií</string>
+    <string name="sample_description_4">ve městě</string>
+    <string name="sample_title_5">na kafe</string>
 
     <!-- Strings displayed only on Google Playstore. Optional, but good to have -->
     <!-- Short description has to have less than 80 chars -->
-    <string name="app_short_description">A simple calendar with events, customizable widget and no ads.</string>
+    <string name="app_short_description">Jednoduchý kalendář s událostmi, přizpůsobitelné widgeta a žádné reklamy.</string>
     <string name="app_long_description">
-        A simple calendar with optional Google synchronization. You can easily create recurring events and setup reminders, it can also display week numbers.
+        Jednoduchý kalendář s volitelnou synchronizací Google. Můžete snadno vytvářet opakující se události a nastavovat připomenutí, můžete také zobrazovat čísla týdnů.
 
-        Contains a resizable 4x4 widget where you can customize the color of the text, as well as the alpha and the color of the background.
+        Obsahuje přizpůsobitelný widget 4x4, kde můžete měnit barvu textu, stejně jako alfu a barvu pozadí.
 
-        Contains no ads or unnecessary permissions. It is fully opensource, provides customizable colors.
+         Neobsahuje žádné reklamy ani zbytečná oprávnění. Je plně opensource, umožňuje měnit barvy.
 
-        The Storage permission is needed only for exporting or importing events from .ics files.
+        Povolení úložiště je potřeba pouze pro export nebo import událostí ze souborů .ics.
 
-        Internet and Contacts permissions are used only at Google sync.
+        Povolení k Internetu a kontaktům jsou nutná pouze pro synchronizaci Google.
 
-        This app is just one piece of a bigger series of apps. You can find the rest of them at http://www.simplemobiletools.com
+        Tato aplikace je součástí větší sady aplikací. Tyto a další aplikace najdete na http://www.simplemobiletools.com
     </string>
 
     <!--