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 event to get a quick view of its Task Card. Click an event directly on its title to access the Task Card.
Step 2 — Remove
Click the More icon (⋮) in the top right corner of the card.
Step 3 — Archive event
In the drop-down menu, select Archive Task Card.
Step 4 – Refresh Page
Now, refresh your page (Command + R - Mac, Ctrl + R - PC) and the event will be removed from the calendar.