For one-time boxes your t-shirt box will ship before the end of the month FOLLOWING the month you purchased your one-time box order (For example: purchase any day in June, your box ships in July).
For monthly subscription boxes your t-shirt box will ship before the end of the month FOLLOWING the month you started your monthly subscription box order (For example: purchase any day in June, your box ships in July). And will ship every month after through cancellation or the end of the program.
The annual subscription reserves all boxes past/present/future and ships them all together in May 2023.