No, it is not possible to block dates or prevent leads from submitting requests for fully booked dates on the standard lead form. However, through an add-on feature, TripleseatDirect, this new form will take into account calendar availability and allow you to mark black-out dates for which people may not request an event.
TripleseatDirect enables your customers to quickly book on and off-premise events in addition to takeout and delivery orders. TripleseatDirect offers contactless booking, ordering, and payment capabilities with an easy-to-use interface. You may find out more about that on our YouTube channel and through this Information Sheet! You can also view our recording about TripleseatDirect.
To enable this feature, your account must be integrated with an online payment provider: Tripleseat Payments, Stripe, Fiserv, or Square. This integration can be set up by a Customer Admin user in your account settings by following the steps in this article.
If you are interested in setting that up after viewing the material, your Customer Admin can go to Marketplace and sign up for Tripleseat Direct there!