Changed

• Replaced "event types" concept with "calendars" (#629)
• Renamed built-in "Regular event" calendar to "Local calendar"
• Weekday labels now use three-letter abbreviations instead of single letters (#103)
• Converting all-day events to timed events now respects the default start time and duration (#917)
• Updated translations

Fixed

• Fixed crashes and freezing on some devices (#889)

Full Changelog: https://github.com/FossifyOrg/Calendar/compare/1.8.1...1.9.0