You can set Modules to be locked until a given date.
Click the Modules link.
Click the Lock until checkbox [1].
Type the date in the Unlock at field [2] or select the Calendar icon [3] to set the date when the module will unlock.
Set the date and time the module will unlock at by clicking on the day [1], typing the time in the time field [2], and clicking the Done button [3].
Set the date [1] and click Update module [2].