If you have a certain Document Type you use (For example, Function Sheet), you can go to the Documents section from your left-size Menu.
Select Documents from left-hand sidebar
Press the "+Add Filter" button at the top-left of the screen
Select the Document Type Filter from the list
Select the relevant Document Type you wish to show
Press the "+Add Filter" button at the top-left of the screen
Select the Booking Start Date Filter and select a Date and Time
You now have a list of Documents from a specific Document Type for a specific Date and Time that you can Export.