By selecting an event and then pressing the Tools button the screen below, with a variety of choices, among which Copy and Duplicate, pops up.
Duplicate Event
Tapping on Duplicate Event results in creation of a new event on the same spot as the original item you selected.
Copy Event
Tapping on Copy Event stores the item you selected into your clipboard.
Using tap & hold in the calendar, you'll then get an additional Paste option to add the event where you're tap and holding.
