The Working Hours Calendar is where the online system gets the store hours to allow products to be reserved. This has to be one of the first things set before online reservations can be active.
Go to Admin>Organization>Site List. Choose Site, (if multiple locations). The Working Hours Calendar will be the blue button at the bottom of the page.
After pressing the Working Hours Calendar button it will take you to the new page. Here is where you set the store active hours.
To add time to the calendar press the Add Time Slots button on the left hand side of the page. This will open a new pop up window where you can set the time frame. Set the From Date, To Date From Time and Duration. The Duration is the length which you allow online reservations to be allowed. After all have been set press the save button.
After all of the reservation periods have been set press the save button at the top right hand side of the page.