I would like to be able to add a single event and have it populate on several calendars on my account without having to add it separately each time.
Greetings and welcome aboard @user4167 
Thank you so much for adding your idea to the Wishlist!
I completely get where you’re coming from, and I couldn’t agree more that this feature would be a huge time-saver.
We’ll try to take your suggestion under consideration. I’ll be posting here in case of any news 