According to the Indian Calendar A tithi is a lunar date, and is one of the five key aspects of an Indian almanac (Panchang - Panch means five and these are the parts). Most of the Indian social and religious festivals are celebrated on the basis of the tithi. Until they left India and went overseas, the Indians do not really need to worry about tithi celebrate their festivals, as a tithi in India almost always falls on the same day for the entire region India.
Even after migration to overseas countries, the Indians live abroad would still celebrate their festivals in the same time as Indians in India. For those who would argue that behind this festival celebrations, it is the belief, that is more important than the date of the celebration, I am one hundred percent with them. However, the intention here is to provide information for those who want to understand how important it behind the tithi in the Indian festivals are based.
The calendar "date" that we are so familiar with in our daily lives is based on the solar calendar. The English calendar is a solar calendar. The basis for the solar calendar is the rotation of the earth around the sun. It takes the earth about 365 � days to its rotation around the sun. The English calendar that most of us use today, the 365 day period of the Earth's rotation around the sun in twelve months. The leap that occurs once every four years for � day per year.
Similar to the solar calendar lunar calendar is also very popular and widely used in Asian countries such as China, Pacific-rim countries, the countries of the Middle East, and India. The lunar calendar, which believes to have originated in India, there is already a very long time, long before the solar system calendar.
The lunar calendar is based on the rotation of the moon around the Earth. The lunar month is equivalent to a full rotation of the moon around the Earth. Since that time the rotation of the moon around the Earth varies, the duration of the lunar month also varies. On average, the lunar month has about 29 � days. Apart from the moon's rotation around the Earth, the lunar years based on the rotation of the earth around the sun. In general, the lunar year, twelve lunar months of a total of about 354 days so that the lunar years shorter by about 11 days as the solar year. However, the lunar calendar accounts for this difference by adding an extra lunar month about once every 2 � years. The extra lunar month is commonly known as the "Adhik Mas" in India (Adhik additional ways of Mas month). The concept of this extra month is similar to the "Blue Moon" in the West, which occurs almost around the same time with the same frequency of 2 � years.
The Indian lunar year begins with the new moon day, occurs near the beginning of the Spring Season . The twelve lunar months are:
Chaitra
Waishakh
Jeshta
Ashadh
Shrawan (Sawan)
Bhadrapad (Bhado)
Ashwin
Kartik
Margshirsh
Paush
Magha
Falgoon (Fagan)
As already mentioned, the difference between the sun and the lunar year extra lunar month occurs about every 2 � years as "Adhik Mas". [1]
According to the calendar of Muslims is widely followed in the Middle East and other Muslim countries, the lunar year is strictly on the basis of twelve lunar months of 354 days per year. That is the reason why their holy month of Ramadan occurs about 11 to 12 days earlier than in previous year.
The solar day (commonly known as the "date" in the Western calendar) has a fixed length of 24 hours. The change of date made by midnight local time or standard time by a particular local time zone. Thus, the date changes from midnight to midnight. The same is true for the day (as in days of the week) changes from midnight until after midnight local or standard time for this place. In other words, to the west (or English) calendar of the length of day and date is exactly 24 hours, and there is a clear correspondence between the date and the corresponding day of the lunar week.
A day begins at sunrise, and the length of the lunar day is determined by the elapsed time between successive sunrises. As per their Jewish lunar calendar day begins in the sunset, and lasts until the next sunset. A lunar landscape day is essentially the same as a weekday. In India, the lunar day is commonly referred to as "war". Just as English calendar has seven days a week, Indian calendar has seven wars for a week. So
English calendar weekdays Indian calendar weekdays
Sunday Rawiwar
Monday Somwar (Chandrawar)
Tuesday Mangalwar
Wednesday Budhwar
Thursday Guruwar
Friday Shukrawar
Saturday Shaniwar
The lunar date, however, varies from about 22 to 26 hours on the basis of the angular rotation of the moon around the Earth in its elliptical orbit. In the Indian calendar, the lunar date is referred to as "tithi". The basis for the length of a lunar landscape Date, the angular distance between the sun and the moon seen from Earth. As the moon revolves around the Earth, the angular distance between the sun and the moon seen from the earth rises from 0 degrees to 360 degrees. It takes a lunar month, or about 29 � days for the solar angular distance between the sun and the moon change from 0 to 360 degrees. If the angular distance reaches zero, the next lunar month begins. Thus, at the new moon a lunar month begins at full moon, the angular distance between the sun and the moon seen from Earth is exactly 180 degrees.
The lunar cycle begins with half-moon, and the crescent moon phase lasts until it culminates in the full moon , Typically lasting for about 15 days. Then enters the moon in the declining phase, until it disappears from the sky by lining with the sun. The waning phase takes about 15 days. According to the Indian lunar month, The Crescent Moon week means "Shudha or Shukla Paksha" and the waning phase of the lunar cycle weeks as "Wadya or Krushna Paksha". Thus, during Shudha (or Shukla) Paksha the angular distance between the moon and the sun varies from 0 degrees to 180 degrees, while during the Wadya (or Krushna) Paksha 180 to 0 degrees. If we divide 180 degrees in 15 equal parts, then every part of 12 degrees in longitude. This makes each of these twelve-degree angle of distance between the moon and the sun is shining, because they come from the lunar soil is the date or tithi. Tithis or lunar dates in Shudha (or Shukla) Paksha begin with Prat Hama (first), Dwitiya (second), and so on until we achieve Poornima, the lunar date for the full-moon day. Also for the waning weeks lunar cycle or Wadya (or Krushna) Paksha, tithis start again with Prat Hama (first), Dwitiya (second), etc., until we arrive Amavasya or the day before the new moon. So, if we are on Ramnavami (the birthday of Rama), it's the Navami (ninth lunar day) of Shudha Paksha of the lunar month Chaitra or Chaitra Shudha Navami. The Gokulashtmi (also known as Janmashtami, the birthday of Krisha) enters into Shrawan Wadya Ashtami (eighth day of the lunar Wadya Paksha of the lunar month Shrawan) .
The angular velocity of the moon in its elliptical orbit around the Earth varies constantly, as he is concerned ( according to Kepler's rule) on the relative distance between the Earth and the moon, and also from the Earth, the relative distance from the sun. As a result of the daily angular velocity (the speed of the angle between the moon and the sun as seen from Earth), land somewhere between 10 to 14 degrees. Since the length of a tithi corresponds to 12 degrees such, the length of a tithi also varies. Therefore, a tithi can find out about one day (24 hours) or they can get skipped when two tithis occur in a day.
Since the angular distance between the moon and the sun, as here, is always relative to the entire earth, Lunar year starts tithi day or at the same time anywhere in the world, but not necessarily the same day. So if a certain tithi clock starts at 10:30 in India starts in New York at the same time, the clock is 12 (EST) on the same day. Since the length of a tithi can vary from 20 to 28 hours, their correspondents to war (a weekday) is too little confusing.
As per the Indian calendar, the tithi for a specific location on earth depends on the angular distance between the moon and the sun relative to Earth at the time of sunrise at this site. For example, assume on a November Monday the sunrise in New York City occurs in 8:30 (EST). Further assume that clock at 9 (EST) on Monday the same angular distance between the Sun and Moon is exactly 12 degrees just after the new moon of the Indian lunar month Kartik. Since the length of a tithi is 12 degrees, the tithi, Kartik Shudha Dwitiya (second day) starts exactly at 9 clock on Monday that the November in New York. But at the time of sunrise at this Monday the tithi Dwitiya not yet begun. Therefore, the tithi for this Monday for the city of New York is Kartik Shudha Prat Hama (first day) .
On the same Monday morning the sunrise in Los Angeles is well past 9 clock (EST). Since the tithi Dwitiya occurs anywhere in the world in the same moment, for Los Angeles, for the tithi Monday would Kartik Shudha Dwitiya.
For the same clock Monday at 9 (EST), it would be in Mumbai or 7:30 PM in New Delhi. So for this tithi Monday for the city of New York, Mumbai, New Delhi and is Kartik Shudha Prat Hama (the first day of the Indian lunar month Kartik), while the regions, such as west of Chicago and St. Louis, for the tithi Monday Dwitiya. In other words, the tithi Kartik Shudha Prat Hama for the regions west of Chicago or St. Louis occur should in the previous days, the Sunday.
Kartik Shudha Prat Hama (the first day of the Indian lunar month Kartik) also happens that the first day after Diwali. Most of the Indians celebrate this as their New Year's Day. The Indians live in India, Europe and the eastern part of the United States should celebrate their New Year on Monday that while regions west of Chicago should be included in the previous trading day, Sunday.
Adhik Mas occurs only when two amavasyas (no moon day) occur while Sun remains in the same sidereal zodiac sign. For more information about sidereal (or fixed) zodiac system relate to book, "Everything is on schedule", Shri Jagdish C. Mahe, Noble House, 1997
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