Panchang in Codcod, Western Visayas, Philippines Fri 29 Sep 2017

Maha Navami follows the tithi at sunrise. Navami runs from 00:06 on Fri 29 Sep to 02:20 on Sat 30 Sep, so it holds sunrise only on Fri 29 Sep, at 05:36. No text giving Maha Navami’s time was found; sunrise is Tithika’s convention.

Maha Navami: every date in Codcod

The Moon gains on the Sun about 12° a day. Each 12° of lead is one tithi: 96°–108° is the 9th, Shukla Navami. A day takes the tithi in force at its sunrise, 05:36 here. Ashtami ended at 00:06, before it. Navami ends at 02:20 Sat, when the lead reaches 108°. The lead passed 0° at the new moon of 20 Sep, so the Moon is waxing: Shukla paksha.

The night of Thu 28 Sep ran from sunset 17:39 Thu to sunrise 05:36, 11 h 57 m. Cut into 15 muhurtas of 47 m, its 14th is Brahma Muhurta, the one before the last.

Daylight here, 05:36 to 17:38, splits into 8 choghadiyas of 1 h 30 m. Their names follow a fixed order that starts from the weekday, and each name is counted good, neutral or bad.

The night here, 17:38 to 05:35 Sat, splits into 8 choghadiyas of 1 h 29 m. Their names follow a fixed order that starts from the weekday, and each name is counted good, neutral or bad.

The fixed stars divide the Moon's path into 27 nakshatras of 13°20′, each in 4 padas of 3°20′. Purva Ashadha spans 253°20′–266°40′; the Moon entered its pada 3 at 260°. It leaves at 18:17, for Uttara Ashadha.

Add the Sun's and the Moon's places among the stars: 161.8° + 260.3° = 422.1°, one full turn and 62.1°. Past the turn, cut into 27 parts of 13°20′, it gives the yoga: 53°20′–66°40′ is the 5th, Shobhana. It ends at 13:54, then Atiganda.

A karana is half a tithi: 6° of the Moon's lead, so the first half of Navami is Balava and the second Kaulava. Balava runs until 13:16, when the lead reaches 102°; Kaulava until 02:20 Sat.

A Hindu day runs from one sunrise to the next, not midnight to midnight. This one runs 05:36 to 05:35 Sat, so the hours after midnight still belong to Shukrawara.

An amanta month runs from new moon to new moon and takes its name from the rashi the Sun is in at the new moon that begins it: Kanya gives Ashwina. The Sun enters Tula on 17 Oct, inside the month. The next new moon, 20 Oct, finds it in Tula and begins Kartika.

A purnimanta month runs from full moon to full moon, so its waning half comes first. It shares its name with the amanta month that its second half falls in: the new moon of 20 Sep, with the Sun in Kanya, began Ashwina. This Shukla paksha reads Ashwina in both counts.

A samvat year begins with Chaitra, the month whose new moon finds the Sun in Meena: 28 Mar 2017, 10:57 Tue. Since then the Sun has moved 178.3° round the stars. Vikram Samvat numbers that year 2074; Shaka Samvat numbers it 1939.