Entering a multi-day event isn't that much different than entering a repeating event.
The key concept to keep in mind is that a multi-day event is just a regular event that repeats for a certain number of days.
Here are some examples, along with how they were configured in the Event Editor:
A 3-day, all-day off-site meeting (Mon-Wed)
How it is displayed:
How it was configured on the Event Editor:
A ping-pong tournament over a weekend (2pm-4pm each day)
How it is displayed:
How it was configured on the Event Editor:
A 1 week Carnival
How it is displayed:
How it was configured on the Event Editor:
Tip
You can also have the multiple event boxes automatically combined by selecting a different calendar view style:
