No, it doesn't take 21 days to form a new habit. A new study shows why | consumer psychology | Scoop.it
From www.sciencealert.com - April 22, 2023 12:52 PM

"In 1960, a plastic surgeon by the name of Maxwell Maltz published a wildly popular book that spawned a spurious factoid – it takes just 21 days to change your ways and form a new habit ..."