To obtain: | Atlantic Daylight Time | subtract 3 hours from Universal Time |
| Atlantic Standard Time | subtract 4 hours from Universal Time |
| Eastern Daylight Time | subtract 4 hours from Universal Time |
| Eastern Standard Time | subtract 5 hours from Universal Time |
| Central Daylight Time | subtract 5 hours from Universal Time |
| Central Standard Time | subtract 6 hours from Universal Time |
| Mountain Daylight Time | subtract 6 hours from Universal Time |
| Mountain Standard Time | subtract 7 hours from Universal Time |
| Pacific Daylight Time | subtract 7 hours from Universal Time |
| Pacific Standard Time | subtract 8 hours from Universal Time |
| Alaska Daylight Time | subtract 8 hours from Universal Time |
| Alaska Standard Time | subtract 9 hours from Universal Time |
| Hawaii-Aleutian Daylight Time | subtract 9 hours from Universal Time |
| Hawaii-Aleutian Standard Time | subtract 10 hours from Universal Time |
| Samoa Standard Time | subtract 11 hours from Universal Time |