Leap Seconds:
Civil time is occasionally adjusted by one second increments called
leap seconds. A detailed explanation of what a second actually is,
and why leap seconds are necessary.
http://tycho.usno.navy.mil/leapsec.html
Astronomical Time Keeping:
Extensive descriptions of many astronomical time keeping systems,
with information on time zones and Julian day numbers.
http://www.maa.mhn.de/Scholar/times.html
Time and Date:
Lots of time and date related information, such as yearly and
monthly calendars, counters, countdown, and the world clock which
shows the current time in cities all over the world.
http://www.timeanddate.com/
Time and Dates:
Information on date, time, and time zones from the New York Public
Library.
http://www.circ.uab.edu/nypldr/1time/index.htm
Lunisolar Calendar:
Calendar with lunations, from new moon to new moon, instead of
months. Moon phase on each day. Chinese, Jewish, and Islamic months.
Eclipses, meteors, planets, star charts. Christian, Pagan, Islamic,
Hindu, and Jewish holidays.
http://www.flash.net/~pburch/lunarcal.html
Blue Moon Myths:
Second full moon in a month, or third full moon in a single season?
http://www.infoplease.com/spot/bluemoon1.html
Maya Calendar 2000:
The calendar was the center of Maya life and their greatest cultural
achievement. To carry out their astronomical calculations they
developed a sophisticated mathematical system. The Maya Calendar
website is developing with the intent of providing a complete view
of Maya culture.
http://mayacalendar.com
Calendar Studies:
Articles on the Gregorian and Julian calendars, the ISO date format,
the Julian day number system, the Maya calendar, the Goddess lunar
calendar, the Liberalia Triday Calendar and C functions for date
conversion; plus software for calendrical conversion.
http://hermetic.nofadz.com/cal_stud.htm
Indian Moons:
A list of many American Indian tribe's names for months, days, and
other calendar related information.
http://members.tripod.com/~PHILKON/moons.html
LunarCal - A Perpetual Chinese Lunar Calendar:
LunarCal is a 160-year perpetual Chinese Lunar Calendar for 1900 to
2060. Chinese festivals are listed and the moon phase is displayed.
http://www.geocities.com/lunarcal
The Chinese Calendar:
The mathematics of the Chinese calendar. Explains the rules for the
Chinese calendar.
http://www.math.nus.edu.sg/aslaksen/calendar/chinese.shtml
The Islamic Calendar:
The mathematics of the Islamic calendar in Singapore.
http://www.math.nus.edu.sg/aslaksen/calendar/islamic.shtml
Calendars through the Ages:
History and FAQs of calendars, from ancient Rome to outer space.
Including Julian, Gregorian, Jewish, Islamic, Chinese, and Mayan.
http://webexhibits.org/calendars/
Annus Novus Decimal Calendar:
A proposal for a non-sectarian, culturally neutral calendar system.
http://www.atlantium.org/calendaran.html
Calendrical Calculations:
Published by Cambridge University Press. Gives a unified algorithmic
presentation of the Gregorian, ISO, Julian, Coptic, Ethiopic, and
Islamic civil calendars.
http://emr.cs.uiuc.edu/home/reingold/calendar-book/index.shtml
Calendopaedia:
The Encyclopaedia of Calendars.
http://www.geocities.com/calendopaedia/
Month Calendar for Any Year:
Create a calendar (requires JavaScript, does not work in Netscape
3). Month poetry, how the months got their names, day names in
different languages, birthstones, gemstones, Roman gods and the blue
moon.
http://www.timekeepers.org/month.htm
Millennium Mistake:
Explains the difference between millenium and year 2000 as the
absence of a year zero.
http://www.millenniummistake.net/
Rosetta Calendar:
An online handy tool for converting to and from the Gregorian,
Julian and Jewish calendars.
http://rosettacalendar.com/
Astronomy Calculator:
Shows moon phases, dates of next lunar eclipse and nest meteor
shower and current position of the other planets.
http://w3.one.net/~rback/frames.html
The Calendar, Leap Years and the Year 2000:
An explanation of the calendar including the origin of the day,
week, month and year.
http://chemistry.csudh.edu/oliver/smt310-handouts/calendar.htm
