Lamp of the Determination of Lunar Days

...this is the established rule. || 86 ||

In the case of a solar asterism Nakshatra original: "Saura-nakshatra," a star or constellation used in the solar calendar system, that lunar day Tithi which exists during the evening time original: "Sayam-kale" is the one to be accepted. If the asterism is present on both [consecutive] days, then the former day is chosen. || 87 ||

Logic original: "Naya," likely short for "Nirnaya," meaning the logical conclusion or determination Even if the asterism is absent on both days, or if it is situated on both, for the rituals of the month of Vaishakha the second month of the Hindu calendar, usually April-May, the lunar day covering the dusk period on the former day is the preferred one. || 88 ||

In this same context, if the asterism is different, the decision is for the subsequent day. In the case of non-solar asterisms, the former day is the one that bestows the intended fruit. || 89 ||

The former day is for worship; [however,] if the lunar day spans the dusk period Pradosha the specific period after sunset only on the subsequent day, then that subsequent day [is chosen]. If it spans the dusk period on both days, then that subsequent day is also the one to be taken. || 90 ||

If it spans the dusk period on neither day, even then the subsequent lunar day should be accepted. If the spanning is equal on both days, or if it occupies a portion of both... || 91 ||

...that subsequent day is to be accepted; this is the established rule regarding the spanning of the proper time. This determination of time Kala-nirnaya for its own asterism has been declared. || 92 ||

The determination of time for other asterisms should also follow this accordingly. In the case of a substitute for fasting Upavasa, the fasting...