You can restrict promotions to make them available only during specific date ranges.
Use the Start Date and End Date fields on the promotion record to set scheduling criteria.
On SuitePromotions, start and end dates are defined in the SuitePromotions Scheduling section on the promotion record.
On standard and Advanced promotions, start and end dates are defined in the Primary Information section on the promotion record.
There are limits to the number of promotions that can be automatically applied based on schedule and location. For more information, see Auto-Apply Promotions Limits.