the solution really would depend on how you are using those two calendars. however, i would suggest that you should still just use 1 calendar and add a bridge table connected to our caledar that allows the user to select from and to date fields. the combination of the two values should be associated to the appropriate dates in the calendar. sharing your DM would help better visualize a solution.
for example, the from and to dates 1/1/2023 to 1/5/2023 shoudl be linked to 1/1/2023,1/2/2023,..1/5/2023
