What's new

If the Tuta theme is "System", toggling "Dark theme" in the Android system settings switches the Tuta theme between light and dark
Calendar date and time pickers are now displayed as dark or light to match the Tuta theme preventing light-on-dark or dark-on-light display bugs
Events spanning multiple days are now listed for each individual day in the widget
Subscriptions to external calendars with "<username>:<password>" in the URL are now supported

Bugfixes

Calendar now displays the correct age of contacts in birthday event previews
Birthday events are now displayed for contacts with birthdays on the 1st of the month
Calendar events attached to emails as .ics file are now always recognised as calendar attachments
Fixed errors when using the Play Store build on GrapheneOS and other systems without Play Store Billing available
Fixed Play Store Subscribers not being able to renew their expired subscription from the play store subscription management interface

calendar-tutao-release-365.261030.0.apk:
a272efaa6810dc3889bdb0f7ec3d799b5c2cc77f4c7ac20d6657e1e2c670ad9a