The Calendar app in macOS Sierra includes maps, weather, and travel time to make setting up and sharing your events easy. It’s also easy to create a new calendar.
By default, macOS includes two calendars in the Calendar app – Work and Home. Ifyou want to create a new calendar, choose New Calendar from the File menu. Type a name for your calendar in the text field. For example, I play in some sports leagues, so I set up one for Sports. You can see and control how your calendars appear by clicking the Calendars button.
To change the color or name of a calendar, select it from the calendars list, then choose Edit > Get Info. To remove a calendar and all of its events, right-click or Control-click the calendar's name, then select Delete from the shortcut menu that appears.
(This how-to is based on my experiences and info on Apple's support pages — where the images come from.)