If you have a lot of events with similar data but they are not a recurring event, the copy event feature is for you.
Start by editing an already existing event on your calendar that you are interested in copying. Click Copy Event in the top right-hand corner of the page.
The event's title will then change to say "Copy of", followed by the event title. This is how it will appear in the calendar until you manually change the event title before you save it:
Once you copy an event, you can now change any of the event's details such as location, dates, times, and descriptions, or leave all the information as is.
Finally, select Save & Close at the top right-hand corner of the page.