 weather.gov |
 |
 |
 |
 |
Home | News | Organization |  |
|
|
Station List Observations Observations via Google Maps Classic Maps Recent Historical DART® MMS ADCP Obs Search Ship Obs Report APEX TAO DODS HF Radar OSMC Dial-A-Buoy RSS Feeds  Email Access Station Status NDBC Maintenance NDBC Platforms Partner Platforms Program Info About NDBC Met/Ocean Moored Buoy C-MAN TAO DART® VOS CSP IOOS® DAC Publications Hurricane Data Plots Mariners Weather Log Observing Handbook No. 1 Science Education FAQ Contact Us Links   |
 |
What is Greenwich Mean Time (GMT)?GMT was established to aid worldwide oceanic navigation and is based on the rotation of the Earth. It was not until the British railway system started using GMT in the mid 1800s that GMT was adopted "for land use". And it was not until the late 1800s that GMT was adopted universally. At this time, the 24 time zones were created along with the International Date Line. I know, you want to know how to convert GMT into your local time zone. Well, it goes like this: During Daylight Savings Time, GMT is 4 hours ahead of Eastern Daylight Time (EDT). So if the time is 0800 GMT, it is 4:00 a.m. in New York City and Miami and 1:00 a.m. in Los Angeles. During Standard Time, GMT is 5 hours ahead of Eastern Standard Time (EST). So, 1000 GMT corresponds to 5:00 a.m. in New York City and Miami and 2:00 a.m. in Los Angeles. Please note that GMT may be listed as Zulu (Z) or Coordinated Universal Time (UTC).
|