What online app/tool do you use as a shared family calendar that sends reminder prompts to everyone?

[FancyShmanci]

Just that really, an online version of the calendar on the wall but it can send reminders of upcoming appointments etc?
TIA

How do you remind yourself that it's someone's birthday?

Remindher app is very good app for families

I like Remindher I thing it’s the best shared calendar for families online because it’s really sharing the mental load

Remindher is the best family calendar app