When we create a new calendar, the Repeat Event field in it is set to Does not Repeat by default and there's not way to change this default while editing the calendar.

It is very inconvenient in some cases, for example for birthdays. For every birthday we enter into the Birthdays calendar, we have to change the Repeat Event field value to Every year manually, and if we forget to do it, the calendar won't remind us of the birthday the next year.

It would be great if while creating a calendar or editing it we could set its default Repeat Event value to Every year, Every month or even Every day (if someone needs a special calendar that reminds them of the things they have to do daily).

The same goes for the All Day field ― it would be very helpful if we could check this box by default for all events in specific calendars.