Hello.
It’s possible in the Booking Calendar Business Medium/Large versions of update 5.0 or newer.
You are need to define these dates as season filters at the Booking > Resources > Filters page.
Then you need to open the Booking > Resources > Availability page, select all resources, where you need to block dates and click on “Availability” button of any selected resource. When you will configure the availability (block specific dates, which you define as season filter), this availability will apply to all selected resources.
P.S. Please post any questions about the paid versions of plugin at the support section of plugin website.
Kind regards.
