The new KDE PIM report is out, bringing news of improved email, calendaring, contacts, and travel apps.
Your favorite email, calendaring, contacts, and travel utilities gained offline AI capabilities, PGP encryption and signing for calendar invitations, an improved looks for Merkuro and much more.
https://kontact.kde.org/blog/2023/2023-11-01-kde-pim-september-october-2023/
Is Merkuro the same thing as Kalendar?
Yes. See this post on Mastodon.