| Royal Observatory at Greenwich - Leap Years [ Kids/Teens/Mature Teens ] - Learn why we have leap years. http://www.nmm.ac.uk/server/show/conWebDoc.349 |
| Several Calendars [ Teens/Mature Teens ] - Learn some basic information about the Egyptian, Roman, Gregorian, Mayan, Islamic, Jewish, and Julian calendars. Also learn how to calculate Easter. http://www.ortelius.de/kalender/idx_en.html |
| The Ancient Calendar [ Kids/Teens ] - The ancient calendar, its origin, problems, and development, plus a look at the names of days of the week http://ancienthistory.about.com/library/weekly/aa100797.htm |
| The Current Calendar System [ Kids/Teens/Mature Teens ] - Learn about our current calendar, daylight saving time, old clocks, new and atomic clocks, and when the millennium begins. http://www.timechange.com/3m/ |
| The French Revolutionary Calendar [ Teens/Mature Teens ] - Convert any date since 1792 to the Jacobin calendar, a calendar that came out of the French Revolution but was ultimately not permanently adopted. http://www.windhorst.org/calendar/ |
| The Moon's Phase [ Kids/Teens/Mature Teens ] - Online calculator that lets you see which phase the moon is in for any date in any year. http://imagiware.com/astro/moon.cgi |
| Time and Date Calendar: [ Kids/Teens/Mature Teens ] - 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. http://www.timeanddate.com/ |
| TimeandDate.com: Calendar [ Kids/Teens/Mature Teens ] - All 12 months, plus lunar phases and some holidays noted. http://www.timeanddate.com/calendar/ |
| Today's Date [ Kids/Teens/Mature Teens ] - 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. http://isotropic.org/uw//date/ |
| Virtual Perpetual Calendars [ Teens/Mature Teens ] - 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. http://www.vpcalendar.net/ |
| Western-Chinese Calendar Converter [ Teens/Mature Teens ] - Tool to convert between the traditional Chinese lunar calendar and the Western solar calendar. Also offers a brief description of the two different calendars and lists links about the Chinese calendar. http://www.mandarintools.com/calconv_old.html |
| Years [ Kids/Teens/Mature Teens ] - How a year is figured and who invented our calendar. http://www.mrdowling.com/601-years.html |
| Zoroastrian Religious Calendar [ Teens/Mature Teens ] - Three versions of the Zoroastrian calendar from the most ancient to more modern calendars. http://www.avesta.org/zcal.html |