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.
An easy to follow tip on how to fall asleep really fast is to avoid having big meals before getting into bed. It takes a couple of hours or more to digest the food and you risk staying awake if you eat more than you need. 19.