Questions and answers
Does this send reminders to my team?
No. It makes one calendar file. Send the file to your team by email or message, and each person opens it to add the reminder to their own calendar.
Will it work in my calendar?
The file is in the standard calendar format that Apple Calendar, Google Calendar and Outlook all open.
Can I change it later?
Delete the reminder in your calendar and make a new file here, or edit the repeating event in your calendar.
Why every three months?
It is long enough to be worth doing and short enough that habits have not faded. You can change the repeat in your calendar.