90 degree east what will be date and time
Answers
Answer:
What is the time on 90 degrees East longitude when the time on the prime meridian is 2:00 pm?
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1 Answer

Greg Lehey, Fascinated observer of world time
Answered May 30, 2018 · Author has 9.6K answers and 3.6M answer views
I could almost say “Read Greg's time conversion answers and substitute the numbers”, but it’ll be clearer if I do it for you.
What time is it at the origin?
In this example, all we know is the latitudes at start at end. We need to convert the start time to UTC. What? Isn't the time at the Greenwich meridian GMT, the same thing as UTC?
No. GMT and UTC are not the same, though they're very close, but they can be up to a second apart. For this discussion, that's not important, so we can assume that GMT is the same as UTC.
More important, though, when people say “the time at”, they're invariably talking about local time.
See Greg's time conversion answers for a discussion of the meaning of “local time”.
In the UK, that's GMT in the winter, but BST (UTC+1) in the summer. And further south, Spain has CET (UTC+1) in the winter and CEST (UTC+2) in the summer. So if the local time is 14:00, the UTC time is 12:00 UTC, 13:00 UTC or 14:00 UTC.
2. What time is it at the destination?
We need to do something similar at the destination. We only have the latitude, 90° E, so we need to go north and south and see what time zones it covers.
In the north you're in Russia's time zone UTC+7.
Further down you're in China, UTC+8.
Sadly, you just miss Nepal with the interesting offset UTC+5:45.
But you get India with UTC+5:30, and Bhutan with UTC+6.
So your time along the line 90° E could be 17:30, 18:00, 18:30, 19:00, 19:30, 20:00, 21:00 or 22:00.