English

10,000 Year Calendar
http://calendarhome.com/tyc
Easy to use calendar web site provides a calendar-maker for the years 0000 to 9999, with holidays automatically inserted. Find out what day of the year you were born, and what other important events happened on the same date.
Subjects:   Date & Time  

Time and Date
http://www.timeanddate.com
Nicely designed web site that provides a customizable world clock, time by continent and city, a calendar generator, and some useful date related calculators.
Subjects:   Date & Time  

Complete Sun and Moon Data for One Day
http://aa.usno.navy.mil/data/docs/RS_OneDay.html
An easy way to find times of sunrise, sunset, moonrise, twilight, transits, etc. for any place in the world.
Subjects:   Date & Time  

WebExhibits : When we change our clocks
http://webexhibits.org/daylightsaving/b.html
Excellent page that simply explains the when and how of changing our clocks for "Daylight Saving Time".
Subjects:   Date & Time  

Seasons
http://scienceworld.wolfram.com/astronomy/topics/Seasons.html
Collection of astronomical definitions for seasons and season-related terms, such as solstice and the equinox. These articles also include links explaining the terms used in the definition. From a larger, searchable, general science reference web site, Eric Weisstein's World of Astronomy.
Subjects:   Date & Time  

Calendar Converter
http://www.fourmilab.ch/documents/calendar
Online conversion tool converts dates between a variety of calendars, both civil and computer-related. This webpage also provides detailed explanations of the history of each calendar system.
Subjects:   Date & Time