See also
- Kids and Teens > School Time > Science > Astronomy and Space > Time
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- 2001 Calendar
Shows each month with the days of the weeks plus when some holidays are.
- Algebra - Fun with Calendars
Perform some mental "magic" tricks based on math and the calendar.
- Aztec Calendar
Shows you the current date according to the sacred Aztec calendar. Gives a reading of the significance of the day and the relevant gods.
- Calculate the Day of the Week
Shows a method to calculate the day of the week for any past or future date. Computer based methods are also shown.
- 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.
- Calendar, a History
A history of the western calendar, including the Gregorian and Julian and Roman Calendars, and how the days of the week and months got their names, and a history of time.
- Calendars Through the Ages
Discusses currently used and unused calendars such as Chinese, Christian, Indian, Islamic, Jewish, Ethiopian, Balinese, Bahai, the French, Mayan, Roman, and some modern schemes for calendar reform. Includes timelines and all about how our week came into being.
- Calendars: Counting the Days
World Book Encyclopedia takes a look at calendars, including the history of calendars, and educational activities that relate to calendars.
- Calendopaedia
All about calendars, different kinds, astronomical time, and how years are counted.
- Cosmic Calendar
Imagine if the history of the universe, all 13 billion years of it, were put into just one year. What would that calendar look like? Carl Sagan, the famous astronomer, made this one.
- Counting the Days
World Book Encyclopedia takes a look at calendars, including the history of calendars, and educational activities that relate to calendars.
- Counting: Calendars and Cords
A look at the methods ancient civilizations used to keep track of time.
- Date Algorithms
Provides descriptions, proofs and computer programming implementation examples to convert dates to various calendar dates for Julian, Gregorian, and Rata Die calendars.
- Eleven Days That Never Were
The curious history of the Gregorian calendar, the one we use today.
- Ethiopian Calendar
Discusses which calendar Ethiopia uses and gives a list of the month's names and public holidays in Ethiopia.
- Gregorian Solar Chinese Lunar Calendar Conversion
Enter a date and convert it to the Chinese calendar.
- Hindu Calendar
This is sometimes called the Indian National Calendar and is based on both lunar and solar years.
- History of the Calendar
How different parts of the world made different kinds of clocks based on where they lived and what kind of weather they had to predict.
- Indian Moons
A list of many American Indian tribe's names for months, days, and other calendar related information.
- Japanese Calendar
Converts Japanese to Western calendar dates.
- Julian Day Calendar
A system of astronomical dating that was devised in 1582.
- Leap Year
The Forest Preserve District of Cook County Illinois explains leap year.
- Leap Years
The Royal Observatory at Greenwich explains why we have leap years.
- Measuring Years
How we measure our year, and learn about different kinds of years, like cosmic and sidereal. Also find out what an olympiad or a score is.
- Online Catholic Calendar
Gives the dates, month by month, of all the traditional feast and holy days for the Roman Catholic Church.
- Phase of the Moon
Calendar showing the phase of the moon for this month or a month/year of your choice.
- Regional Islamic Calendar
The months of the Islamic calendar and when they occur in the Americas, Europe-Africa-Asia, and Asia-Pacific.
- Religious Calendars and Holy Days
Explanations of the Christian, Jewish, Muslim, Hindu, Buddhist, Sikh, Bahai, and Wiccan calendars. Also includes a list of holidays associated with these calendars.
- Several Calendars
Learn some basic information about the Egyptian, Roman, Gregorian, Mayan, Islamic, Jewish, and Julian calendars. Also learn how to calculate Easter.
- The Ancient Calendar
The ancient calendar, its origin, problems, and development, plus a look at the names of days of the week
- The Chinese Calendar
Find out if this is the year of the dragon, the snake, the horse, or another animal according to the Chinese lunar calendar.
- The Current Calendar System
Learn about our current calendar, daylight saving time, old clocks, new and atomic clocks, and when the millennium begins.
- The French Revolutionary Calendar
Convert any date since 1792 to the Jacobin calendar, a calendar that came out of the French Revolution but was ultimately not permanently adopted.
- The Islamic, Hijri, Calendar
Based on the lunar year of 354 days.
- The Jewish Calendar
Based on both solar and lunar years.
- The Moon's Phase
Online calculator that lets you see which phase the moon is in for any date in any year.
- Time and Date Calendar:
This site includes lots of information that is time and date related, such as yearly and monthly calendars, counters, countdown, and the world clock which shows current time in cities all over the world.
- TimeandDate.com: Calendar
All 12 months, plus lunar phases and some holidays noted.
- Today's Date
Today's date from the Gregorian calendar that we use into the calendar dates of the Mayan, French, Islamic, Hebrew, Julian, Ethiopic, Coptic, Chinese, Julian, and Discordian calendars.
- Virtual Perpetual Calendars
Lets you know what any calendar looks like for the 20th and 21st centuries. Also includes holidays, leap years, which years a particular day of the week always falls on, and methods of calculation.
- What a Calendar Is
World Book Encyclopedia takes a look at calendars, including the history of calendars, calendars in use today, ancient calendars, and what a new calendar might look like.
- Years
How a year is figured and who invented our calendar.
- Zoroastrian Religious Calendar
Three versions of the Zoroastrian calendar from the most ancient to more modern calendars.
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