Jump to content

Sign in to follow this  
Guest vernonb4

A Question of Time.......

Recommended Posts

Guest vernonb4

Can anyone explain why it is that while there are five hours difference in time between New York and London, there is only four hours difference in ZULU time between them, when ZULU time starts in Greenwich just outside of London. Vernon Brown

Share this post


Link to post

Hi Vernon,Could it be that ZULU time doesn't care about DST maybe?Cheers,

Share this post


Link to post
Guest frankathl

Hi Vernon,The ZULU time difference between London and New York is (always) 5 hours.The 4 hour difference you're referring to occurs as a result of the Daylight Saving Time scheme, but only for a very short time(of about a week) during the year.Why? Well, in summer, clocks in the UK are set forward by 1 hour during the period from the last Sunday in March to the last Sunday in October. A similar change is made in the US, but the timeframe is from the 1st Sunday in April to the last Sunday in October. So, the only period during which there is 4 hour difference between London and New York is from the last Sunday in March to the 1st Sunday in April of any particular year.You'll find a timezone map here: http://aa.usno.navy.mil/faq/docs/world_tzones.htmlBR,Frank

Share this post


Link to post
Guest boxjockey99

Sorry Frank but the previous poster was correct, GMT / ZULU is not affected by DST at all and so when daylight savings comes into affect you are out by 1 hr till DST ends. Its a pain as my flying roster is always in GMT which causes major problems when setting the old alarm clock for those early starts!RegardsKris

Share this post


Link to post
Guest JDavidson

Reminds me of my time in Iraq - all our watches had to be set to ZULU time (in order to coordinate operations) whereas our body clocks were operating in CHARLIE time.James

Share this post


Link to post
Guest frankathl

"the previous poster was correct, GMT / ZULU is not affected by DST at all"That's what I said, Kris! Quote: "The ZULU time difference between London and New York is (always) 5 hours." :-)The 4 hour time gap is between British Standard Time and US Eastern Time, when they are temporarily(hah!) out of sync.BR,Frank

Share this post


Link to post
Guest frankathl

Hi Wolfgang,Yes, of course! I don't know why I put it like that.:-( Your mail makes things very clear.Apologies for compounding the confusion.BR,Frank

Share this post


Link to post
Guest vernonb4

Thank you everyone for your kind replies, especially Frank for your Time Zone chart which is very useful as I frequently fly my 737-900 internationally.. I am well aware that there is a five hour difference between "Q" (thank you Frank) and GMT, the problem was that when I went to set the correct time in FS9's clock it insisted there was only a four hour difference! Maddning! Well, we all know Murphys Law (Sod's Law to some of you), and now that I have gone back and retested it sure enough the correct spread is now there, so it looks as if all is well once again.... Vernon Brown

Share this post


Link to post
Guest frankathl

Hi Vernon,You're welcome!I see you live in Greenwich, CT. How appropriate!! :-).BR,Frank

Share this post


Link to post

Join the conversation

You can post now and register later. If you have an account, sign in now to post with your account.
Note: Your post will require moderator approval before it will be visible.

Guest
Reply to this topic...

×   Pasted as rich text.   Paste as plain text instead

  Only 75 emoji are allowed.

×   Your link has been automatically embedded.   Display as a link instead

×   Your previous content has been restored.   Clear editor

×   You cannot paste images directly. Upload or insert images from URL.

Sign in to follow this  
×
×
  • Create New...