Time magazine reported on June 12 [1944] that âas far as the U.S. Army can determine, the first use of D for Day, H for Hour was in Field Order No. 8, of the First Army, A.E.F., issued on Sept. 20, 1918, which read, âThe First Army will attack at H-Hour on D-Day
The best way to fall asleep regularly is to make sure your sleep cycle is regular. If you don't know your schedule, or how long you should sleep for: 1  For two weeks, go to bed at the exact same time. 2  Get out of bed when you wake up in the morning â don't hit snooze or keep sleeping.
Get plenty of sleep. Getting proper sleep will help your muscles recover more quickly and put you in better shape next time you hit the gym. Aim to get 7-8 hours of sleep. Consistent sleep is made more possible when you go to bed around the same time each night and rise around the same time in the morning.