Lunar month with the Sun one or two days before that evening ("e.g.", in the Islamic calendar). In ancient Egypt the lunar month began on the day when the waning moon could no longer be seen just before sunrise. Others use calculation, of varying degrees of sophistication, "e.g.", the Hebrew calendar or the ecclesiastical lunar calendar. Yet others run from full moon to full moon. Calendars count integer days, so months may be 29 or 30 days in length, in some regular or irregular sequence. In India the month from conjunction to conjunction is divided into thirty parts known as "tithis". The
Mithuna (month) solar month of Karkaṭa. The Mithuna month is called "Ani" in the Tamil Hindu calendar. The ancient and medieval era Sanskrit texts of India vary in their calculations about the duration of Mithuna, just like they do with other months. For example, the "Surya Siddhanta" calculates the duration of Mithuna to be 31 days, 15 hours, 28 minutes and 24 seconds. In contrast, the "Arya Siddhanta" calculates the duration of the Mithuna month to be 31 days, 14 hours, 34 minutes and 24 seconds. Mithuna is also an astrological sign in Indian horoscope systems, corresponding to Gemini (astrology). Mithuna (month)