The publication of calendars under the name "Hot Shots" began in 2008 and, according to the information the producer's website, it is to end with the 2020 calendar, which has just been released.

In the message from the Hot Shots website, we can also read:

"(...) Our aim was simply raise as much money for injured servicemen and women as we could during that time, however long it ended up being, we’re proud to say that last year saw us hit that milestone of twelve years in publication along with 10’s of thousands of dollars/pounds donated to various wounded veteran charities.

Welcome to this, the final installment of the now famous Hot Shots Calendar (...)

We’ve had many themes over the years and we fully understand it’s all subjective, so with that in mind, we will be opening up the whole archive in 2020 for you to purchase in print form or download so you can enjoy and keep forever.
We wanted to make sure we finished at the top of our game and we feel this is the best way for us to bow out…"

Calendars can be purchased on the hotshotscalendar.com (USA/Canada) and hotshotscalendar.co.uk (GB and the rest of the worlkd) websites at 19.50 USD or 14.50 GBP.

Sources: soldiersystems.net,  hotshotscalendar.com