This rather wonderful poster is a Gallifreyan Perpetual Calendar and Galactic Star Chart. It lets Timelords or their companions discover the day of the week for any given day between the years 1600 and 9999 AD. That’s a pretty wide scope.
As a bonus, any Timelord might be pleased to know that they star chart also lets them view the night sky from the South Pole on Earth as it was on 23rd November, 1963 which is the night Doctor Who first aired on the BBC.
The chart is licensed, approved, covered in Whovian images, quotes and symbols and they’ll be on sale in March with benefits for people who pre-order now.