Where Can I Set My Business Hours?
You can set each of your location's hours independently.
Go to Company Settings and click the action button of the location for which you want to edit and click Location Details.
Scroll down to Business Hours. You can set whether you are open or closed for each day of the week as well as set the hours the location is open.
Your Business Hours will determine the days and times that customers are allowed to choose as fulfillment times in your online store.