We are thrilled to announce the launch of our brand-new, stand-alone Tuta Calendar app for Android and iOS - however, Apple is holding the release back right now! 
Get ready to take control of your schedule with the world’s first quantum-safe encrypted calendar. Now, all your personal and professional appointments can be managed securely - anytime, anywhere.
You can learn more about the Tuta Calendar and all its features here: Exciting News from Tuta: Introducing the Tuta Calendar! 🎉 | Tuta
Top, at last, the calendar application is finally autonomous, thanks Tuta
When will there be a Github version of Tuta Calendar to download via Obtainium and Tuta mail and Calendar available on Accrescent?
Very good news. Are you planning to add a tasks feature (like a to-do list with due dates) in the future as well?
The GitHub release is available here: Release [Calendar] 246.240930.0 (Android) · tutao/tutanota · GitHub
Yes!
Yes, calendar sharing was available in the previous version of the calendar and remains in the new Tuta Calendar app.
Since it’s in the same repository as my already installed Tuta Mail app, Obtainium refuses to install it. Also, being available on Accrescent would be nice.
My wishlist would be to be able to support CalDAV.
It is a way to be ahead of Proton and everyone here is currently looking for replacement for EteSync or NextCloud Calendar
Yep. That way, we could use it in default Calendar app. Like how the app supports contact sync via CardDAV.
Problem is Tuta don’t support third party clients on Desktop which is a huge PIA for Contacts and Calendar to be used in default app, if we even exclude email.
I could use all my stuff in my Kmail Integration if Tuta supports these.
I have the same problem. I can’t update tuta anymore from obtainium.
Is there an ETA on the widget?
Any plans for Tuta contacts?
Contacts sync is seamless but currently there is no option to add contact profile picture 
I think it’s just better to use the default contacts app and sync via Tuta. It’s seem unnecessary to be honest.