Time Zone Conversions
Conversion between time zones obeys the relationship
- "time in zone A" − "UTC offset for zone A" = "time in zone B" − "UTC offset for zone B",
in which each side of the equation is equivalent to UTC. (The more familiar term "UTC offset" is used here rather than the term "zone designator" used by the standard.)
The conversion equation can be rearranged to
- "time in zone B" = "time in zone A" − "UTC offset for zone A" + "UTC offset for zone B".
For example, what time is it in Los Angeles (UTC offset= −08) when the New York Stock Exchange opens at 09:30 (−05)?
- time in Los Angeles = 09:30 − (−05:00) + (−08:00) = 06:30.
In Delhi (UTC offset= +5:30), the New York Stock Exchange opens at
- time in Delhi = 09:30 − (−05:00) + (+5:30) = 20:00.
These calculations become more complicated near a daylight saving boundary (because the UTC offset for zone X is a function of the UTC time).
Read more about this topic: Time Zone
Famous quotes containing the words time and/or zone:
“Every time you hear a bell ring, it means that some angel’s just got his wings.”
—Frances Goodrich (1891–1984)
“There was a continuous movement now, from Zone Five to Zone Four. And from Zone Four to Zone Three, and from us, up the pass. There was a lightness, a freshness, and an enquiry and a remaking and an inspiration where there had been only stagnation. And closed frontiers. For this is how we all see it now.”
—Doris Lessing (b. 1919)