Simple-Calendar

Fixed one more case of CalDAV events getting duplicated
Fixed the "New event" button sometimes not working properly
Fixed some cases of empty weekly views at app launch
Few other UX and stability improvements

Many bugfixed related to CalDAV sync and event importing via .ics files
Fixed a couple weekly view related glitches
Open specific event details on clicking it from Event list widget
Fix a glitch related to events repeating by X weeks for a long time
Many other smaller fixes and performance/stability improvements

Fixed some crashes and UX glitches

Initial Pro version
Fully rewrote the database storing events
Fixed some issues related to importing events from .ics files and CalDAV sync

Couple smaller UX improvements
This version of the app is no longer maintained. Please upgrade to the Pro version. It is free till Nov 24 2018. You can find the Upgrade button at the top of the app Settings.

Fixing a crash related to pull-to-refresh swiping

Add optional pull-to-refresh for refreshing CalDAV events on some views (by azisuazusa)
Allow setting a default view to be opened from the Event List widget (by knusprjg)
Apply selected filters on all views, including widgets
Allow changing any CalDAV calendars color, even if only locally
Fix some glitches related to saving CalDAV events in a wrong calendar
Some performance improvements related to fetching events
Couple other smaller stability/ux improvements

Fixed transparent date/time picker backgrounds

Increased the minimal required Android OS version to 5
Some translation and stability improvements

Fixed some crashes related to specific invalid times in some timezones
Added some holidays in Malaysia and Australia by youdly
Added a new warning if the app notifications are disabled by the system
Some other translation improvements and bugfixes

Replaced colored event type dots with bars for better visibility
Fixed some wrong reminder date data
Properly highlight running all-day events
Fix a glitch with CalDAV events being saved in the wrong calendar
Couple other smaller UX and translation improvements

Added a Go To Today button at the monthly widget
Increase the allowed length of event titles, locations, descriptions
Couple other stability and UX improvements

Made reminder sounds more reliable on Android Oreo
Properly fetch running events at reboot, notify only if needed
Couple UX and stability improvements

Allow customizing the audio stream used by reminders
Show the time remaining till the reminder appears
Couple other UX and stability improvements

Make reminders on Android Oreo more reliable
Allow deleting only future occurrences of repeating events
Fixed some visual glitches at the weekly view
Multiple CalDAV event related improvements

Make sure the alarm rings properly at DND mode
Improved the UK holidays and added Singapore ones
Make Event list items more compact when possible
Couple other UX improvements and bugfixes

Fixing some widget related crashes

Fix app not opening at clicking widgets
Make sure we store the proper calendar ID at events
Couple stability improvements

Fix app not opening at clicking widgets
Couple stability improvements

Allow changing the app launcher color
Allow setting reminder looping till dismissed
Added a button in Settings for changing widget colors without recreating them
Added optional dimming of past events
Make Event List view an endless scrollview
Added some more advanced yearly repetition rules
Improved some country holidays
Many CalDAV related improvements
Many other smaller bugfixes and performance/UX improvements