Can customers select a date like Thanksgiving each year to receive their subscriptions?
Bold Subscriptions does not have a calendar feature where customers can select a specific date for their initial subscription order. The initial order is always generated the moment the subscription order is placed. You can offer fixed frequencies where a subscription generates all recurring orders on a specific date such as the 15th of each month, however, this would not work for a holiday like Thanksgiving as that date changes each year.
Customers can change the order date for an existing subscription in the customer portal, once they are already subscribed, if you allow it in the customer portal settings.