In the instance where you want to change the order settings for specific holidays, the HOLIDAYS button in your Webconsole can allow you to do just that. You can disable Pickup, Delivery, or Both for any given day you choose. 

To adjust the ordering settings you want to offer during HOLIDAYS, click Admin, then Settings on the lower left of your Webconsole.

Then click ADD HOLIDAY 

From there, simply enter the appropriate information (Date, Special Open/Close Time, Name of Holiday). You can disable Pickup, Delivery, or Both. Once done, click Submit:

NOTE – this will apply to all locations (if you have more than one).