Normally, a Calctime system will delete all the punch information three days after the end of a pay cycle.
Occasionally, this does not happen for reasons we will never understand. Normally, if you leave it alone for a few more pay cycles, it will sort itself out. However, you can force a purge if that is what you want to do. However, this will wipe out all punch data, so you'll want to do it right after the last person punches out for the current pay period, then run a report for that pay period. It will not clear the names, numbers, or other settings.

To “force a purge“:
First, run all your payroll reports.

Next:
Go in to the supervisor menu as you normally do. #, ENTER, 1234, ENTER.

Next, Press #. It should say “ENTER PASSWORD“.

Enter the days date (example, today is August 20,
                          so  you would enter 0 8 2 0 then ENTER.

Use the arrow key until CLEAR ALL FILES is displayed, then press ENTER.

When this is complete, just press clear twice to go back to normal operating mode.
All punches will be erased, but the employee files, pay cycle, overtime and rounding rules will all be intact.

If you are changing the pay cycle, print out the current punch records.
Next, go in to manager mode and change the pay cycle as needed.
If you leave it alone, it will change the pay cycle at the very begining of the new pay period.
Or, you can force it to change NOW.
To do this:
Set the date/time for 11:59PM just one minute before the beginning of the new pay cycle.
-  In the future, not in the past.
Exit the program.
Let it run until 12:00AM, the start of the new pay period.
Now, go back in and change the date back to today's date and time and exit the program.