Tulā calculates the duration of Tula to be 29 days, 21 hours, 26 minutes and 24 seconds. In contrast, the "Arya Siddhanta" calculates the duration of the Tula month to be 29 days, 21 hours, 40 minutes and 48 seconds. The Indian solar month names are significant in epigraphical studies of South Asia. For example, "Tula" month, along with other solar months, are found inscribed in medieval era Hindu temples. Tula is also an astrological sign in Indian horoscope systems, corresponding to Libra (astrology). Tulā Tulā is one of the twelve months in Indian solar calendar. Tula corresponds to the zodiacal
Lunar phase phases shifts by an average of almost one day for each successive month. (A lunar year lasts about 354 days.) Photographing the Moon's phase everyday for a month (starting in the evening after sunset, and repeating roughly 24 hours and 50 minutes later, and ending in the morning before sunrise) and arranging the series of photos on a calendar would create a composite image like the example calendar (May 8 – June 6, 2005) shown on the left. May 20 is blank because a picture would be taken before midnight on May 19 and the next after midnight on May