The hour you log a habit predicts whether you keep it

If your tracker stores a timestamp rather than just a date, you have a leading indicator that most people never look at. The hour at which a habit gets completed drifts, and the direction of the drift tells you something before the completion rate does.

The pattern is consistent enough to act on. A habit that is working gets logged at roughly the same time each day, usually near its cue. A habit that is failing starts drifting later. First it slips by an hour, then it lands in the evening, then it becomes a thing you do at 23:40 to keep the streak, and then it stops. By the time the completion rate falls, you have already had three or four weeks of warning in the timestamps.

There is a related signal in the spread. A habit with a tight distribution of completion times has a real cue. A habit with completions scattered from 07:00 to midnight has no cue and is running purely on you remembering, which is a fragile way to run anything.

This page covers how to extract completion times from an export, the two charts worth making, what the drift threshold should be before you act, what to do about it (move the cue, not the target), and the habits where late logging is completely fine.

Outline

Status: outline. The introduction above is finished copy. Everything below is the section plan for the full draft, targeted at about 1 500 words.

1. What the timestamp gives you. Beyond the date, and which apps store it.
2. The drift signal. Later and later, weeks before the rate moves.
3. The spread signal. Tight distribution means a real cue.
4. Two charts. Histogram by hour, and completion time over the last 90 days.
5. A threshold for acting. How much drift is noise, and how much is a warning.
6. What to change. Moving the cue, not the target.
7. Habits where late is fine. Evening habits and the ones with no natural hour.