March 7th is the 66th day of the year (67th in leap years) in the Gregorian calendar. There are 299 days remaining until the end of the year. This date is slightly more likely to fall on a Monday, Wednesday or Saturday (58 in 400 years each) than on Thursday or Friday (57), and slightly less likely to occur on a Tuesday or Sunday (56).
321 – Emperor Constantine I decrees that the dies Solis Invicti (sun-day) is the day of rest in the Empire.
1876 – Alexander Graham Bell is granted a patent for an invention he calls the “telephone.”
1900 – The German liner SS Kaiser Wilhelm der Grosse becomes the first ship to send wireless signals to shore.
1965 – Bloody Sunday: a group of 600 civil rights marchers is brutally attacked by state and local police in Selma, Alabama.
1986 – Challenger Disaster: Divers from the USS Preserver locate the crew cabin of Challenger on the ocean floor.
Breaking Bad Star Bryan Cranston turns 62
The Office Actress Jenna Fischer turns 44
Fifty Shades of Grey Writer E.L. James turns 55
The Mummy Actress Rachel Weisz turns 48
Jackie Actor Peter Sarsgaard turns 47