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:
“The time was once, when thou unurged wouldst vow
That never words were music to thine ear,
That never object pleasing in thine eye,
That never touch well welcome to thy hand,
That never meat sweet-savored in thy taste,
Unless I spake, or looked, or touched, or carved to thee.”
—William Shakespeare (1564–1616)
“The human race is a zone of living things that should be defined by tracing its confines.”
—Italo Calvino (1923–1985)