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A comment on Technology that changed air travel. Parent comment

Re:Technology that changed air travel by vinay427 on Tuesday May 19, 2020 @03:37AM (#23232269)
It's really poorly phrased in the article but I assume what they meant is that LHR is in a time zone that sometimes observes GMT, and otherwise observes BST (British Summer Time) in the summer which is 8 hours ahead.

It's not exactly correct that SFO is 7 hours behind GMT because this isn't true for around half the year. It also isn't exactly true that LHR is in GMT.

Most of the year, SFO is actually 8 hours behind LHR. A few weeks are off due to different DST dates.

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Re:Technology that changed air travel by PuddleOfSausage on Tuesday May 19, 2020 @06:02AM (#23233148)
The author/editor has mentioned elsewhere in this thread that he was using dummy data (which contains mistakes). For this dummy December flight LHR would be in GMT (UTC+0) and not BST (UTC+1).
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