The Official NIST US Time: Synchronizing. 24-hr. Pacific Time (DST). PacificTime

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My life my style
History A Walk through Time
History of timekeeping from ancient to modern times.
(at NIST)
Calendar Calendars through the Ages
Systems of counting the days, months, and years.
dst Daylight Saving Time
When and why do we change our clocks?
Why It’s About Time
Advances in timekeeping accuracy and atomic clocks.
(at University of Wisconsin)
Quartz Quartz Clocks and Watches
What’s inside your wristwatch?
(at Explainthatstuff)

Disclaimer Note: Linking to these sites does not imply
recommendation or endorsement of the information or
commercial products by NIST or USNO.

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