If you wish to set up a new Teamup calendar that's similar to one you already have, with the same repeating events "carried over" into the new calendar, here's how:
Export the repeating events
A user that has administrator access can go to Settings > Export and export the calendar data you wish to carry over to a csv file. Set the repeating event option to one row per series:

Duplicate the original calendar
Duplicate the current calendar to keep the same settings and structure.
Then import the csv file with repeating events into the new duplicate calendar.
Note: Imports cannot be undone. Feel free to create a test calendar by starting one of our Live Demo calendars to try the process beforehand.