Will my resolution make it?

Type one resolution, or tap Work out, Quit smoking, Quit drinking, Read, Save money or Learn a language, and you get a calendar from January 1 to December 31. The resolution can be up to 40 characters; in the share text a long one is shortened with “…” so the whole line fits a chat preview (45 characters).

You can check any day from your start date up to today. Future days can’t be checked. Forgot yesterday? Check it later. It is a self-reported record and nobody verifies it.

“Kept” is the number of checked days from your start date to today. The streak counts back from today, or from yesterday if today isn’t checked yet. Missing a day resets the streak, never the kept count.

Before the year starts you see the days until January 1 and the date of Quitter’s Day. From January 1 until Quitter’s Day you see your kept days and the days left. On the day itself it says “today is Quitter’s Day”; after it, “past Quitter’s Day” once you check any day on or after it, or “nothing since Jan 8” if you haven’t. If you started after it, its square turns grey and reads “n/a”.

The calendar rolls over to the next year on November 1, so you can set up next year’s resolution in November and December. The start date defaults to January 1; changing it never deletes earlier checks.

The name comes from Strava. In 2018 it looked at the 31.5 million activities uploaded in January and said the second Friday of the month is when exercising drops off. Strava’s own press release no longer opens, so the source here is BikeRadar’s report of it (January 12, 2018).

In 2025 Minnesota’s governor proclaimed January 10, the second Friday, Quitter’s Day. The proclamation says the second Friday in January “is historically dubbed” Quitter’s Day. In 2026 the public radio station WVPE used the same name for January 9, again the second Friday.

Strava’s own later dates were Thursday, January 17, 2019 and Sunday, January 19, 2020, so the second Friday is a common reading rather than a fixed rule. This calendar uses the second Friday and shows where that reading comes from. The date moves every year: Fri, Jan 8, 2027, Fri, Jan 14, 2028, Fri, Jan 12, 2029.

It’s printed in red like a public holiday, and it is not a day off, so the square says so. No source gives the share of people who quit on that day, so no percentage is attached.

The three flags carry numbers only from studies that measured that exact point in time. Day 7: in a 1988 US study that followed 200 resolvers, 77 out of 100 kept their resolution for one week. The same study found 19 out of 100 at two years, which is outside this calendar, so it only appears here.

June 30 (6 months): a 2002 US study that followed 159 resolvers by phone found 46 out of 100 continuously successful at six months. December 31 (1 year): in a 2020 Swedish study of 1,066 participants, 55 out of 100 responders said they had kept their resolution a year later. People who didn’t answer are not in that number.

The three studies differ in who took part, where, and what “kept” meant. So the numbers are never joined into a curve, and there’s no “ahead of N%” figure for Quitter’s Day. Day 8 isn’t one week, and the studies are small and old.

The same 2020 study found that goals phrased as doing something (58.9%) were kept more often than goals phrased as stopping something (47.1%). The line under the input repeats that finding. It is a study result, not advice.

Your resolution, start date and checked days live only in this browser’s storage (localStorage). There’s no account and no server, so clearing site data or switching phones starts you from empty.

A witness link packs a snapshot after the # in the address. Browsers never send that part to any server, so it’s decoded only inside your friend’s browser. Analytics get the template type, a rough bucket of how many days you checked and whether you pressed share. Never the resolution text or any date.

A self-tracking calendar, not medical or psychological advice.