Select "Offer Scheduling" and select the days and hours you want the offer to be active.
TIP: Selecting the column or row titles automatically selects all hours or days.
Please be aware that this scheduling follows the account timezone configuration.
NOTE: If the selected timezone has an offset that includes half an hour, this half hour won't be considered. For example, an account timezone of "India" (+5:30h offset from UTC) will actually have an offset of +5h relative to UTC.