Create an event in Calendar:
To choose a date and time for your event, click the date and time boxes, and select when your event starts and ends.
Set up a recurring event, such as weekly meetings:
When you’re finished filling in the details, save your event:
Update existing events:
Need a little extra time to prepare for an important meeting? Or, maybe you don’t need a reminder about an activity after all. You don’t have to change your default notification settings — just add or update reminders for that particular event: