Ruling · Mahānavamī · 1917

Wednesday 24 October

Determinatein Daqing, under the Rashtriya Panchang method. Clear of every threshold by 75 minutes.

Decide it for

DaqingDelhiKolkataSingaporeSydneyJersey City

46°35′ N 125°00′ E · Asia/Shanghai · GeoNames 2037860

The two middays

One ghaṭī is 24 minutes. Madhyāhna is 1 ghaṭikā either side of midday.

Midday of Wednesday 24 October

Taken. The only midday Navamī reaches.

madhyāhna begins 11:00  11:48 madhyāhna ends
10:1210:3611:0011:2411:4812:1212:36

48 of 48 minutes covered

Midday of Thursday 25 October

Navamī is absent from madhyāhna. Not taken.

madhyāhna begins 11:00  11:48 madhyāhna ends
10:1210:3611:0011:2411:4812:1212:36

0 of 48 minutes covered

Navamī presentMadhyāhna, the window the rule readsThe instant the tithi begins or ends

How it was decided

  1. 01

    Aṅga

    Navamī runs from 09:45 on Wed 24 Oct to 07:40 on Thu 25 Oct.

    1917-10-24T01:44:55Z → 1917-10-24T23:39:54Z

  2. 02

    Kāla

    Madhyāhna is 1 ghaṭikā either side of midday: 11:00–11:48 on the 24th, 11:00–11:48 on the 25th.

    madhyahna: midday-pm-1-ghatika · sunrise and sunset: upper limb, 31′ + 16′

  3. 03

    Rule

    Navamī must be present during madhyāhna. It covers 48 of 48 minutes on the 24th and 0 of 48 on the 25th.

    Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 104

  4. 04

    Tie-break

    Only one midday qualifies. No tie-break is needed.

    priority: purvaviddha → only-day · margin 4506 s

  5. 05

    Ruling

    Mahānavamī, Daqing, 1917: Wednesday 24 October.

    confidence: determinate

Say it like this

In Daqing, Mahānavamī 1917 falls on Wednesday 24 October. Navamī runs from 09:45 on Wed 24 Oct to 07:40 on Thu 25 Oct and covers all of madhyāhna that midday.

ahargana.org/daqing/festivals/1917/mahanavami · pac-rp@2026.1

Who says what

AuthorityKindDate
Ahargaṇa, pac-rpThis rulingWed 24 Oct
Ahargaṇa, classicalDisc centre, no refractionWed 24 Oct
compat-drikpanchangComparison profileWed 24 Oct
No institution has a recorded ruling for Daqing.

Institutional rulings are recorded with a source address, and are never edited to agree.

The rule, as data

/rules/mahanavami · ruleset 2026.3-draft

Month
Āśvina, amānta
Pakṣa · aṅga
Śukla · Navamī
Kāla
Madhyāhna
Priority
Pūrvaviddhā
Tie-break
First day
Reference
CRC 1955, p. 104

“S 9 Mahanavami (purvaviddha) (In Bengal it is observed as paraviddha covering one muhurta from sunrise).” Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 104. The Bengal reading (paraviddha, one muhūrta from sunrise) is not applied.

The same rule, elsewhere

Twelve places, west to east. Local clock times.

PlaceNavamīMadhyāhna 24thCoveredMadhyāhna 25thCoveredRuled
Los Angeles17:45 → 15:4011:1348 min11:130 min24 Oct
Chicago19:45 → 17:4011:1148 min11:100 min24 Oct
Jersey City20:45 → 18:4011:1648 min11:160 min24 Oct
Port of Spain21:45 → 19:4011:2648 min11:260 min24 Oct
London01:45 → 23:4011:2048 min11:200 min24 Oct
Durban03:45 → 01:4011:1648 min11:160 min24 Oct
Dubai05:26 → 03:2111:2048 min11:200 min24 Oct
Delhi07:15 → 05:1011:4148 min11:410 min24 Oct
Kolkata07:15 → 05:1010:5748 min10:570 min24 Oct
Singapore08:45 → 06:4011:2548 min11:250 min24 Oct
Sydney11:45 → 09:4011:1619 min11:160 min24 Oct
Suva13:45 → 11:4011:270 min11:2713 min25 Oct
Profile · tradition
pac-rp@2026.1 · smarta
Rule
mahanavami@2026.3-draft
Engine · kernel
0.1.0 · de440 7eef…ea74
Boundary margin
300 s

About Ahargaṇa