People are more motivated to pursue goals at the start of a new time period -- New Year, new month, new week, birthdays, even Mondays. These temporal landmarks create psychological separation from past failures and a sense of a clean slate, making users more receptive to new habits and commitments.
In 2014, Hengchen Dai, Katherine Milkman, and Jason Riis at the Wharton School analysed gym attendance data from a large university fitness centre. They found attendance spikes at predictable intervals: the start of a new week, the start of a new month, the start of a new semester, after birthdays, and after holidays. Users were not becoming fitter at these intervals -- they were becoming more motivated. The researchers called it the fresh start effect.
The mechanism is psychological distancing. Temporal landmarks -- Mondays, the first of the month, New Year's Day, birthdays -- create a mental boundary between the current self and the past self. Past failures are attributed to the “old me.” The present moment feels like a clean slate, untainted by previous abandoned goals. This separation is largely illusory -- nothing has changed except the date -- but its effect on motivation is measurable and reliable.
For product designers, the fresh start effect means timing matters as much as content. A re-engagement email sent on a random Wednesday and the same email sent on a Monday morning will perform differently -- not because of the copy, but because of when the recipient reads it. The Monday version lands on a temporal landmark where the user is already primed for new beginnings. The Wednesday version does not.
“Temporal landmarks disrupt attention to day-to-day minutiae, inspire broader consideration of life goals, and produce a discontinuity in self-perception that allows people to dissociate from their past imperfections.”
— Dai, Milkman & Riis, 2014
Re-engagement campaigns are designed to bring churned users back. Most teams optimise the copy, the offer, and the subject line -- but ignore the most powerful variable: timing. A re-engagement email that arrives on a temporal landmark frames the return as a fresh start. The same email on a random day frames it as going back to something you already quit.
The content differences matter -- normalizing the gap, offering new content, removing guilt. But the timing difference matters more. The first-of-the-month, Monday morning delivery lands at exactly the moment when the user is most psychologically primed for a new beginning. The fresh start effect does half the persuasion work before the email is even opened.
Streaks are powerful motivation tools, but they create a problem: what happens when the streak breaks? Without careful design, a broken streak feels like a total loss. The user has failed, and the sunk cost of the previous streak is gone. Many users never come back after a streak break. The fresh start effect offers a solution: frame the reset as a new beginning rather than a loss.
The key difference is framing. Both screens communicate the same fact: the streak is broken. But the first version frames it as loss (crossed out, reset to zero, “start over”). The second version frames it as a foundation for a new beginning (total days preserved, best streak celebrated, next goal set just one day higher). The fresh start effect needs something to start fresh from -- a record to beat, a total to build on, a ranking to maintain.
The fresh start effect has direct implications for when to launch marketing campaigns, feature announcements, and trial offers. The same campaign will convert at different rates depending on when it reaches users. Temporal landmarks create windows of higher receptivity.
The implication is not that all campaigns should launch on January 1st. It is that different temporal landmarks serve different purposes. A fitness app's biggest acquisition window is New Year. A B2B tool's is Monday morning. A subscription service's is the first of the month. Matching the campaign type to the right temporal landmark amplifies the fresh start effect.
The fresh start effect is one of the few psychological principles that is almost entirely about timing. The content of your message matters, but when it arrives matters more. A re-engagement email, a feature announcement, or a trial offer that lands on a temporal landmark inherits the motivational boost of a perceived new beginning -- for free.
The deeper principle is that people want to believe they can change. Temporal landmarks give them permission to try by creating psychological distance from past failures. The most effective products do not just tell users to start again -- they give them a reason to believe this time will be different.
Dai, H., Milkman, K. L., & Riis, J. (2014). The fresh start effect: Temporal landmarks motivate aspirational behavior. Management Science, 60(10), 2563–2582. — Peetz, J., & Wilson, A. E. (2013). The post-birthday world: Consequences of temporal landmarks for temporal self-appraisal and motivation. Journal of Personality and Social Psychology, 104(2), 249–266.