While you were busy with October’s chaos, millions of people quietly started a four-month self-improvement challenge that’s changing how we think about New Year’s resolutions. It’s called “The Great Lock-In,” and even though it kicked off September 1st, the best news is this: you’ve still got six weeks to join in, which is actually plenty of time to make real progress.
The premise flips our usual approach to goal-setting on its head. Instead of making vague January promises that fizzle by February, participants chose specific targets back in September and have been working on them through fall. Now, with the challenge entering its final stretch, early adopters are seeing real results while late joiners are discovering that mid-November is actually a perfect entry point.
How a TikTok Trend Went Mainstream
The Great Lock-In started on TikTok over the summer, using the Gen Z term “lock in” (which simply means to enter deep focus on a goal). By September, it had spread beyond teens to working professionals, parents, and people in their 40s and 50s who were tired of watching another year slip away without meaningful progress.
The timing resonated. Fall naturally brings structure back after summer’s mayhem. Kids return to school, work routines normalize, and cooler weather makes indoor pursuits more appealing. Why wait until January when you could start now and enter 2026 already ahead?
What’s particularly telling: the American Dialect Society voted “lock in” the “most useful” term of 2024. The phrase emerged as a direct response to our distraction-saturated culture, with people essentially declaring, “I have to force myself to focus to accomplish anything anymore.”
What People Actually Committed To
The goals vary wildly, but most successful participants chose two or three specific targets rather than attempting total life overhauls. A 27-year-old entrepreneur increased her gym frequency and added more cardio. A retired police officer enrolled in an MFA program. High school teachers adopted “lock in” language for exam prep sessions with students.
The pattern among people still going strong in mid-November? They picked realistic, measurable goals. “Go to the gym four times weekly” beats “get in shape.” “Read 20 pages daily” works better than “read more books.” The specificity creates accountability.
Some focused on career advancement, using fall to build new skills or finally tackle that certification program. Others zeroed in on health habits like meal prepping, consistent sleep schedules, or cutting back on alcohol. Many chose creative projects they’d been postponing for years.
The Science Behind the Timeline
Here’s why the September-to-December window works so well, and why joining now still makes sense: researchers at University College London found that forming a new habit takes an average of 66 days. Six weeks until December 31st gives you 42 days, which gets you well into habit territory, especially for simpler behavioral changes.
Katy Milkman, a Wharton professor who studies behavior change, points to the social component as crucial. “Everybody else is doing it is one of the most motivating ways to get people to change their behavior,” she explains. When friends, coworkers, or even strangers online are tackling similar challenges, momentum builds.
The approach also sidesteps January’s notorious failure rate. Traditional New Year’s resolutions often collapse because they’re made during the holiday madness and attempted during the dark, cold depths of winter. Starting in fall means building momentum before the holidays rather than trying to create it afterward.
Why Late November Is Actually Perfect
If you’re reading this thinking you “missed” the Great Lock-In, consider this: you haven’t. Six weeks is enough time to establish a meaningful practice, see real progress, and enter January already in motion rather than starting from scratch.
The psychological advantage of starting now is huge. While everyone else is still in “I’ll start after the holidays” mode, you could be six weeks into a new routine by January 1st. You’d be maintaining and refining rather than white-knuckling through those brutal first weeks when willpower is lowest.
Choose one or two things that genuinely matter to you. Make them specific and measurable. Tell someone about them for accountability. Then just show up consistently until December 31st.
The Real Shift Here
The Great Lock-In represents a cultural shift in how we think about self-improvement. It acknowledges that we’re all struggling with focus and follow-through in an era deliberately designed to fragment our attention. By naming that struggle and building community around it, the movement makes change feel more achievable.
Whether you started in September or you’re jumping in today, the appeal is universal: looking back at year’s end and seeing real progress instead of wondering where the time went. No special rules required, no posting on social media necessary. Just pick something meaningful and show up for it.
The year isn’t over yet. There’s still time to make it count.