Eastern Standard Time was a timekeeping term used on Earth in the 20th and 21st century. Known by the abbreviation "EST", the zone ran through a latitude of North and South America, including the Eastern Seaboard of the United States of America.
In 1969, the first manned moon mission, Apollo 11, was originally scheduled to be launched at 6 AM, Eastern Standard Time, on a Wednesday. (TOS: "Tomorrow is Yesterday")
In actuality, Apollo 11 launched 9:32 am Eastern Daylight Time on Wednesday, July 16th, 1969.