Introduction In the tapestry of Hindu timekeeping, the Tithi holds a place of paramount importance. Unlike the Gregorian calendar, which is based on the solar cycle, the Hindu Panchang (almanac) is lunisolar. A Tithi is essentially a lunar day, representing the angular relationship between the Sun and the Moon. Because the duration of a Tithi can vary anywhere from 19 to 26 hours, calculating them requires complex astronomical algorithms. Prison Break Season 1 All Episodes English Subtitles Free