Time availability is a feature that can display your items on a period of time. This is considered Promotion for Limited Time Offer.
Go to Dashboard > Catalog > Products and then Edit a certain item by clicking the Edit Icon under Actions column.
You will see the Time Availability on the left side of the Product Edit
Under TIME AVAILABILITY – on a certain item, you can set time for the following – MONDAY to FRIDAY > Set time from 00:00 up until 23:55
Under that, there is also Special Day
You can select from Start Date to End Date with its availability and time applicable.
Then hit SUBMIT to apply changes.