Thirtyfirst Deadline Countdown

Thirtyfirst is a watch face for Wear OS that counts the days to 31 January, the UK Self Assessment deadline for online tax returns and for paying the tax owed. GOV.UK gives the deadline for the 2025 to 2026 tax year as 11:59pm on 31 January 2027 (gov.uk/self-assessment-tax-returns/deadlines).

THE COUNTDOWN
From 1 November a line under the time reads, for example, "48 days to 31 Jan", with a ring around the dial showing how much of the run-up is left. Both stay a calm blue until the last 14 days, turn amber, and turn red for the last week. On 31 January it reads "Deadline today". From February to October the countdown is hidden and Thirtyfirst is a clear time-and-date face.

ALREADY FILED?
In the face editor, set "Already filed?" to "Filed" and the countdown is replaced by a quiet "Return filed" with a full blue ring. The setting stays on your watch; nothing is sent anywhere.

THREE THEMES
Night, Ledger and Graphite. The time, the countdown in each of its three colours, and every other text colour have a contrast ratio of at least 7:1 against the background.

ONE SLOT
A complication slot at the bottom shows your battery until you change it to anything your watch offers.

Always-on mode keeps the date, the time and the countdown wording, in grey on a black screen.

Free. No ads, no in-app purchases, no data collected and no permissions. This is a Watch Face Format face: it contains no code, and it never asks for or sees any tax details.

To use it, touch and hold the current watch face, swipe to Thirtyfirst, then tap the pencil to choose a theme or mark it filed. Requires a round Wear OS 4 or newer watch.

Good to know: Thirtyfirst is an independent countdown made by TurboKast Ltd. It is not made by, connected with or endorsed by HMRC or GOV.UK, and it is not tax, financial or legal advice; it does not tell you whether you need to file. Always check your own deadlines on GOV.UK. Screenshots show sample dates.

Font: Atkinson Hyperlegible, copyright 2020 Braille Institute of America, Inc., SIL Open Font License 1.1.