"EST" is the abbreviation for a time zone. It is the time zone for the East Coast of the United States. So this time:

4pm EST

Means 4 o'clock in the afternoon on the East Coast of the U.S.

Some other time zones include:

  • GMT - Greenwich Mean time, which is the time zone in Britain
  • PST - Pacific Standard time, which is the West Coast of the U.S.

This phrase appears in these lessons: