This might sound like a crazy question, but it is a real one for pretty much every church, "which option for calendar software is best for our church?"
The reason it can be confusing is that there are so many voices and solutions out there.
Most websites offer calendar features options. Many Church Management Systems have a calendar option or even are built around a calendar. Event management softwares offer calendars. Facility management softwares offer calendars. And, of course your office management software like Outlook and Google integrate their calendars into everything.