Every drop lists the estimated ship date in the description, way down at the bottom usually.
With the FedEx Smart Post shipping method they use, i usually add about a week for it to get to my door
Some regular drops still have early enough dates. And the MassDrop made products that they stock shouldn't be a problem to get by then.
For me personally, other than the in stock MD made items, i probably wouldn't risk it without a backup plan