The length of redeemables and the time frame settings are done in the validity section of creating the Redeemable.
When you set-up a redeemable, the validity step is where you can set up the parameters of your redeemable availability.
In this step, Validity, you'll determine the dates and locations the redeemable will be valid, as well as setting recurrence and guest notifications to alert them of the offer's approaching expiration.
To end your redeemable after a set number of days from launch, enter an amount in the Expiry (In Days) field; set a hard date for your redeemable to end, click the Explicit Date of Expiry field and choose an expiration date from the calendar.
Alternately, if you don't want your redeemable to have an expiration date, click the Allow this redeemable to run indefinitely toggle to enable it.
In the Remind before field, enter a time (in days) to remind a guest in advance that the redeemable is expiring. For example, if you enter "3", the guest will receive a notification 3 days prior to the redeemable's expiration.
While optional, we strongly recommend using this setting.