Calendar events aren't necessarily something big and boring. They're usually small things that form your routine - a workout, Spanish class, team meeting, etc.
Here's how to create a new event:
Tap at the top right of the screen in a day, week or month view.
Type the title and select the time.
Add a contact, location or note.
Tap Save.
Or, there's a simpler way - tap and hold on the timeline in Day, Week or Month View