In your widget, you may wish to show all of your availability, but only allow bookings to commence on certain days of the week.
For example, if you rent out a holiday cottage and only wish to take 5-day bookings that commence on a Monday, but you would also like people to be able to contact you for booking weekend breaks, then this setting is perfect for you.
From the Dashboard, click the Cog/Settings icon.
Click Dept Settings.
Change the Service Type field to Day-Based. This will enable an additional option called Non-Start Days.
By default this option will be set to Bookings can start on any day, however, you can choose Bookings can start only on specific days, which will open a check box list for you to select which days you wish to be bookable start days.