1 Moon of the Earth, possibly
1 Born Every Minute
The ditloid "e 1 the p m" stands for "Every 1 person matters." Ditloids are word puzzles where a phrase is represented by numbers and letters, and in this case, it emphasizes the importance of each individual.
1955 five minutes to eight
Days in Every Month
5 Events in the Modern Pentathlon
1973: Britain Enters the Common Market.
One Man's Loss is Another Man's Gain
"One Man Went to Mow", the title of a children's song.
ElectroMagneticPulse
1st March = Saint Davids Day Gavin.
This is a Ditloid. The answer is 26 Miles in a Marathon. (approximately)
M stands for Mass