What Is October Theory? The TikTok Reset Trend Explained
October theory is the idea that October is a second January. With about 90 days left in the year, people look back at what they've done, decide what they still want to change, and start now instead of waiting for New Year's resolutions. It comes back on TikTok and Instagram every autumn, and October 1 is when it starts.
What October theory means
The "theory" is less a rule than a mood. October is when the end of the year starts to feel close. The holidays are coming, the days are getting shorter, and you can still get a lot done before December 31.
People use it for all kinds of changes: a new workout routine, better sleep, a new hobby, a job search, a cleaner budget, or simply more intention about how they spend their time. The common thread is starting in October, with about 90 days to show for it by January.
Where it came from
Videos about October theory started appearing on TikTok in 2023, and the idea took off in October 2024. That month TODAY reported that a video by TikTok user Chloe Van Berkel, posted on October 2, had 1.7 million views. Newsweek covered creators who told followers to treat the last three months as a 90-day challenge. One popular twist, from creator Kelly Sites: type "October" into your phone's photo search and scroll through your past Octobers to see how much changed each year.
Is there anything to it?
Nothing makes October special in itself, but the feeling behind the trend is well studied. Researchers call it the fresh start effect. A 2014 study found that people are more likely to start working on goals right after "temporal landmarks" such as the start of a new week, month or year. October 1 is the start of a month and of the year's last quarter, and the trend makes it feel like a landmark.
The 90 days also fit what we know about habits. In a well-known 2009 study at University College London, a new daily habit took a median of 66 days to become automatic, though it ranged from 18 to 254 days. Start on October 1 and a simple habit has a fair chance of feeling normal by the new year.
October theory vs the winter arc
The two trends start on the same day and often get mixed up. The winter arc is about discipline: training, early alarms and less scrolling, from October 1 to the end of the year. October theory is broader and softer: it's about looking back at the year and choosing what to change. Plenty of people do both.
How to try it in five minutes
- Look back. Search your photos for "October" and scroll through previous years.
- Pick three things you want to be true by December 31. Keep them small enough to start today.
- Write them down where you'll see them, and add a reminder for November 1 to check in.
- Start today, even with ten minutes. The trend only works if October 1 is day one.
Quick answers
When does October theory start?
On October 1. From then to December 31 is 92 days.
Do I have to start exactly on October 1?
No. The date is only there to give you a push. Starting on October 10 still leaves you more than 80 days.
Is it the same as "October is the new January"?
Yes, that's the same idea in fewer words.
