Ruling · Mahānavamī · 2072

Thursday 20 October

Determinatein Daqing, under the Rashtriya Panchang method. Clear of every threshold by 342 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 19 October

Navamī is absent from madhyāhna. Not taken.

madhyāhna begins 11:01  11:49 madhyāhna ends
10:1310:3711:0111:2511:4912:1312:37

0 of 48 minutes covered

Midday of Thursday 20 October

Taken. The only midday Navamī reaches.

madhyāhna begins 11:01  11:49 madhyāhna ends
10:1310:3711:0111:2511:4912:1312:37

48 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 17:31 on Wed 19 Oct to 19:42 on Thu 20 Oct.

    2072-10-19T09:30:53Z → 2072-10-20T11:42:15Z

  2. 02

    Kāla

    Madhyāhna is 1 ghaṭikā either side of midday: 11:01–11:49 on the 19th, 11:01–11:49 on the 20th.

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

  3. 03

    Rule

    Navamī must be present during madhyāhna. It covers 0 of 48 minutes on the 19th and 48 of 48 on the 20th.

    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 20532 s

  5. 05

    Ruling

    Mahānavamī, Daqing, 2072: Thursday 20 October.

    confidence: determinate

Say it like this

In Daqing, Mahānavamī 2072 falls on Thursday 20 October. Navamī runs from 17:31 on Wed 19 Oct to 19:42 on Thu 20 Oct and covers all of madhyāhna that midday.

ahargana.org/daqing/festivals/2072/mahanavami · pac-rp@2026.1

Who says what

AuthorityKindDate
Ahargaṇa, pac-rpThis rulingThu 20 Oct
Ahargaṇa, classicalDisc centre, no refractionThu 20 Oct
compat-drikpanchangComparison profileThu 20 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 19thCoveredMadhyāhna 20thCoveredRuled
Los Angeles02:31 → 04:4212:1448 min12:130 min19 Oct
Chicago04:31 → 06:4212:1148 min12:110 min19 Oct
Jersey City05:31 → 07:4212:1748 min12:170 min19 Oct
Port of Spain05:31 → 07:4211:2748 min11:270 min19 Oct
London10:31 → 12:4212:2148 min12:2121 min19 Oct
Durban11:31 → 13:4211:1734 min11:1748 min19 Oct
Dubai13:31 → 15:4211:400 min11:3948 min20 Oct
Delhi15:01 → 17:1211:420 min11:4248 min20 Oct
Kolkata15:01 → 17:1210:570 min10:5748 min20 Oct
Singapore17:31 → 19:4212:260 min12:2548 min20 Oct
Sydney20:31 → 22:4212:160 min12:1648 min20 Oct
Suva21:31 → 23:4211:270 min11:2748 min20 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

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