Definition that contains standard time
- est standard time in the 5th time zone west of Greenwich, reckoned at the 75th meridian; used in the eastern United States
- pst standard time in the 8th time zone west of Greenwich, reckoned at the 120th meridian west; used in far western states of the United States
- cst standard time in the 6th time zone west of Greenwich, reckoned at the 90th meridian; used in the central United States
- mst standard time in the 7th time zone west of Greenwich, reckoned at the 105th meridian west; used in the mountain states of the United States
- hawaii time standard time in the 10th time zone west of Greenwich, reckoned at the 150th meridian west; used in Hawaii and the western Aleutian Islands
- pacific standard time standard time in the 8th time zone west of Greenwich, reckoned at the 120th meridian west; used in far western states of the United States
- mountain standard time standard time in the 7th time zone west of Greenwich, reckoned at the 105th meridian west; used in the mountain states of the United States
- atlantic time standard time in the 4th time zone west of Greenwich, reckoned at the 60th meridian; used in Puerto Rico and the Virgin Islands and Bermuda and the Canadian Maritime Provinces
- yukon time standard time in the 9th time zone west of Greenwich, reckoned at the 135th meridian west; used in Hawaii and most of Alaska
- central standard time standard time in the 6th time zone west of Greenwich, reckoned at the 90th meridian; used in the central United States