Select the Closed Dates option on the Additional toolbar at the top of the screen.

This will open up the Closed Dates screen as shown below...

To Add a new closed date or date range, click on the Add button. This will open up the closed date details screen.

Select either a Single Date or Date Range and specify the date(s) you require the closure to be active.

You can also select whether the closure only applies to specific rooms and/or meals and which days of the week.

Once you have selected the required closure settings, click on Save to apply the closure to your e-Res system.