To schedule ticket tiers to start and / or end at a certain time or date.
1. Navigate to Events > Manage Ticket Tiers
2. Select the ticket tier name that you would like to hide.
3. Start the Starts At time for when sales become active and then the Ends At a time for when you want the ticket tier sales to end. Hit the save button, double check all is saved correctly and if it is then all is working correctly.
Note that if the allocation hits its sales limits then the ticket tier will also become sold out status. Please keep that in mind when setting start & end dates for your ticket tiers.