Like you MGM I have not used an alarm clock for over 40 yars. Come to that I haven't worn a watch for over 35 years.

I would look at a clock before I went to bed and tell myself I had to be up at 5.30 or whenever and would duly wake up in plenty of time.

As to not using a watch I am seldom more than 15 minutes out if asked the time.

Being retired time is not my master, come to think of It, it never has been.

I keep naval time in my daily arrangements, if I arrange to meet at 3 I will be there at 5 to, and do use a clock occasionally to ensure this, other than that time does not figure in my world.