Solar Calendar - Sidereal Solar Calendars

Sidereal Solar Calendars

Further information: Sidereal time

If the position of the earth (see above) is reckoned with respect to the fixed stars, then the dates indicate the zodiacal constellation near which the sun can be found. A calendar of this type is called a sidereal solar calendar.

The mean calendar year of such a calendar approximates the sidereal year.

Indian calendars like the Hindu calendar, Bengali calendar, Malayalam calendar and Tamil calendar are sidereal solar calendars. The Thai solar calendar, based on the Hindu solar calendar is also a sidereal calendar. They are calculated on the basis of the apparent motion of the sun through the twelve zodiacs rather than the true tropical movement of the earth.

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