All Treasury Software products have a built in calendar - called 'Periods'.
If you are at this Help page, the system probably took you here, as your calendar is near the end and you have to add more dates.
Periods are typically the end of each month. If you run the 'Periods' report, it might look like:
Enter into an account (repeat for each account)
One at a time
From the main menu select the Settings tab > Maintenance tab > Periods tab
Follow the directions below:
or
Import a file
From the main menu select Settings tab > Maintenance tab > Periods tab.
Follow the directions below:
Congratulations. All done!