Events
Anything people sign up for — a trip, a class, a workday, a dinner.
Groups meeting
Put there by the group's own leader. They carry no sign-up — a group is already a roster.
Sharing this list
Your public page: testchurch.churchos.app/events — everything you have opened a link for and left ticked.
The short address, testchurch.churchos.app, lands there too: it is the one to print on a bulletin.
The same list is a calendar feed at testchurch.churchos.app/events/feed.ics — in Google Calendar, add it under Other calendars → From URL, and what you list here shows up there on Google’s own schedule (usually within hours).
Keeping the calendar in Google? Subscribe its calendars and their events join the public page as notices.
To put this list on your own website, paste this into any page — it stays current on its own.