Just kidding. It depends on what gown you want to purchase. Some gowns can take up to 4-5 months to order from other designers, some gowns can be shipped within a few weeks without rush charges.
We also have an in-house designer who can make a gown in a rush, and all of our sample gowns are for sale.
Because of this time variation, the sooner you order your gown, the more choices you will have without rush charges.