The Windows calendar file is stored in the profile location below. (You may need to enable hidden folders and file extensions to find this path.)
C:\Users\USERNAME\AppData\Local\Microsoft\Windows Calendar\calendars\CALENDAR NAME.ics
Put your username or profile name where the bold Username text is.
You can copy the ICS file to the new profile location
Alternatively you could use the export feature then import from the file menu within Windows calendar.