According to a 2009 study published in the European Journal of Social Psychology, it takes 18 to 254 days for a person to form a new habit.
The study concluded that, on average, it takes 66 days for a new behavior to become automatic.
One of the dearest people in my life set an alarm to show up for herself. She shared that with me that a couple of months ago and, I loved the idea so much, I adopted it for myself. "Hey Siri, set my alarm for 8 a.m" 😴