Bid periods are usually created on a yearly basis, but you can create bid periods at any time.
To create a new bid period:
Click the Periods tab.
Click the Add button. The N-PBS Scheduler displays the Add Period screen.
Enter a name for the period.
Select the start date and the end date for the period.
Click the Save button. The N-PBS Scheduler creates the period and adds it to the list of periods.
Note: Your bid periods should be discrete and not overlap each other.