The Difference Between GMT and UTC

Even pilots occasionally get this wrong!

Greenwich Mean Time (GMT) is often interchanged or confused with Coordinated Universal Time (UTC). However GMT is a Time Zone whereas UTC is actually a Time Standard. To put that more plainly, one can't fly in UTC Time, as it's not a time zone.

GMT and UTC are always the same real time, and neither are affected by Daylight Savings Time. But just to add a little confusion, there are few countries that change their time zone to adjust for Daylight Savings Time (DST).  The United Kingdom is one of those counties!  The UK uses "British Summer Time" (BST), which is an hour ahead of GMT.

In 2016, British Summer Time began on Sunday, March 27th and ends on Sunday, October 30th.  As such, those in the United Kingdom will be in GMT+1 for the OVPA Broadcast on September 24th at 1900 GMT.

It's may not be a complete list, but some other countries which use BST (GMT +1) are:

  • Jersey
  • Isle of Man
  • Guernsey

Some, but not all States in the U.S. observe Daylight Savings Time.

What this all means is that you should always check a time zone chart when you are scheduled for an International event!!!


If you would like to check your time zone at any time during the year, feel free to use our Interactive Time Zone Map in the "Time Across the World" page here on our website.