Calendar 2009

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Calendar

Today: Saturday 04. July 2009

2009 - 2010

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*yaer from 1970 to 2037

A calendar is a system of organising days for a socially, religious, commercially or administratively useful purpose. This organisation is done by giving names to periods of time - typically days, weeks, months and years. The name given to each day is known as a date. Periods in a calendar (such as years and months) are usually, though not necessarily, synchronised with the cycles of some astronomical phenomenon, such as the cycle of the sun, or the moon.

Calendar

Solar calendars assign a date to each solar day. A day may consist of the period between sunrise and sunset, with a following period of night, or it may be a period between successive events such as two sunsets. The length of the interval between two such successive events may be allowed to vary slightly during the year, or it may be averaged into a mean solar day. Other types of calendar may also use a solar day.

Lunar calendars Not all calendars use the solar year as a unit. A lunar calendar is one in which days are numbered within each lunar phase cycle. Because the length of the lunar month is not an even fraction of the length of the tropical year, a purely lunar calendar quickly drifts against the seasons. It does, however, stay constant with respect to other phenomena, notably tides. A lunisolar calendar is a lunar calendar that compensates by adding an extra month as needed to realign the months with the seasons. An example is the Jewish calendar which uses a 19 year cycle.

Today: Saturday, 4. July 2009 Name Day: Madison, Maddison, Madyson, Toby Tomorrow: America, Thomas, Tom, Tomas, Tommie, Tommy After tomorrow: Aileen, Javier, Xavier
» Name-Day » Birthday cards	» F l o w e r s » Greeting cards