@chrisc thank you for your question! At the moment, we only support viewing and RSVPing to events from the mobile applications. We do have this feature in our backlog (“Create calendar events on mobile”) and I request you to submit your vote for it here to inform the priority! - https://community.front.com/ideas

I’m reviving this post to announce that creating and editing calendar events is now available on mobile! It’s been released in version 5.57.0.