1. Open Microsoft Calendar and select the calendar you want to set up reminderes for.

2. Click on the 'New Series' button at the top toolbar.

3. Enter the title, date, and other required information and set the recurrence pattern as desired.

4. Click on the 'Reminder' tab on the right side of the page and select the frequency and type of reminder.

5. Click on the ‘Send’ button to save the changes.

6. The reminder has now been set.