If you create an event and decide that you may not actually need it, you can remove them. To easily delete events from your Calendar page, follow these steps:
Step 1 — Choose an Event
Hover over any given event to get a quick view of it's Task Card. Click and event directly on it's title to access the Task Card.

Step 2 — Remove
Click the Remove Icon (🗑) in the top right corner of the card.

Step 3 — Gone
When you're done the even't will be gone!
