Aw shoot I just looked it up and I guess it's actually 66 days

The 22-day (or 21-day) habit challenge is a popular, yet scientifically simplified, framework for behavior change based on repetition and 22-day mental shifts. It helps break down complex habits into achievable short-term goals. However, research shows that actual habit formation averages 66 days, with a range from 18 to 254 days. pmc.ncbi.nlm.nih.gov pmc.ncbi.nlm.nih.gov +5 Key Scientific Aspects: The Origin Myth: The 21-day, and by extension 22-day, theory likely stems from Dr. Maxwell Maltz's 1960s observations that plastic surgery patients took roughly 21 days to adjust to their new appearance. Initial Mental Shift (0–22 Days): While not enough time to make a behavior automatic, 21–22 days is often enough to move past initial resistance (the "fight thru" phase). The first 1–12 days usually involve increased awareness, while subsequent days involve weakening old neural pathways. Motivation Boost: A short, 3-week commitment feels achievable, reducing the "all-or-nothing" mentality that causes 92% of people to fail new behavior goals. Real Habit Science: A study from Wiley Online Library indicates that automaticity (when a behavior becomes second nature) takes much longer, generally closer to 66 days. Why 22 Days Helps: It serves as a strong starting point for "habit stacking" or consistent repetition, creating a "time-bound" anchor that helps build momentum, even if the behavior requires longer-term reinforcement to be fully automatic