Ganapati's Treatise on Auspicious Moments

...the Lunar, the Solar, and the month determined by the sun's entry into a zodiac sign Sankranti. || 31 || The Civil month Savana consists of thirty days; the Sidereal month Nakshatra is measured by the moon's passage through the constellations. These months are established for specific purposes. || The learned should always recognize these months: || 32 || The Solar month is used for poetic works, marriages, and determining the planetary days. The Civil month is used for calculating the term of pregnancy and medical treatments. The Sidereal month is used for observing the formation of rain clouds. || 33 || Vows, sacrifices, and similar rituals are calculated using the Lunar month. The Lunar month is of two types: ending with the new moon Amanta or ending with the full moon Purnimanta. || 34 || The month ending with the full moon is preferred for rites concerning the gods, while the month ending with the new moon is for rites concerning the ancestors. || 35 || Now, the definition of the Fortnights: There are two fortnights, the Bright Shukla and the Dark Krishna, used for divine and ancestral rites respectively. All auspicious activities are praised when performed in the Bright fortnight. || 36 || Thus ends the chapter on the Year and related divisions in the Muhurta Ganapati, composed by Ganapati, the son of the illustrious astrologer Ravala Harishankara Suri. || 1 ||

Now, the Chapter on Lunar Days (Tithis)

The first day Pratipat, the second, the third, and then the fourth, fifth, sixth, seventh, and eighth; || 1 || the ninth, tenth, eleventh, twelfth, thirteenth, and then the fourteenth is known. || 2 || The full moon day Purnima is the end of the Bright fortnight, while the new moon day Amavasya is recorded in the Dark fortnight. The presiding deities of these days are: Fire, the Creator Brahma, the Serpent Gauri/Shiva, Ganesha, the Serpent-King, Yama, and the Sun; || 3 || Shiva, the Mother Goddesses, the Sun, Cupid, the All-gods, Vishnu, the God of Desire, and the Moon. For the new moon day, the Ancestors are proclaimed as the presiding lords. || 4 || The lunar days, starting from the first, are categorized as Joyous Nanda, Prosperous Bhadra, Victorious Jaya, Empty Rikta, and Full Purna. This sequence repeats every five days, starting again from the sixth and the eleventh. || 5 || In the Bright fortnight, the three groups of five lunar days are considered respectively: mediocre, auspicious, and most auspicious. In the Dark fortnight, they are considered auspicious, mediocre, and undesirable for good works. || 6 || Now, the Nanda and other categories...