Astronomical time keeping
http://www.maa.mhn.de/Scholar/times.html
Daylight
saving time
http://webexhibits.org/daylightsaving
Systems
of time
http://tycho.usno.navy.mil/systime.html
|
Time and date
http://www.timeanddate.com
Time
service department USNO
http://tycho.usno.navy.mil/time.html
Time zone converter
http://www.timezoneconverter.com
|