When you add an event to your calendar, you want to make sure it appears on other calendars so you have the same information no matter what calendar you are looking at.
This guide helps you synch an event across calendars when you schedule it with your Calendar app.
First, open your Calendar app and select "Schedule Event." from the menu on the left side of the screen.
From there, you'll see your existing events and a box that says, "Create New Event." Select that by clicking on the "+" sign.
You will then see a menu that allows you to "Create Event." There is also a menu option that says "Advanced Settings."
Select "Advanced Settings." This menu gives you many options to further customize your event. One of these options is to select the synced calendar that you would like to include when adding a particular event.
Use the drop-down menu to select which calendar you would like to sync for this event. After doing so, you'll be able to ensure that the event is included on the calendars you selected.