Ruling · Mahānavamī · 1939

Saturday 21 October

Determinatein Daqing, under the Rashtriya Panchang method. Clear of every threshold by 499 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 Saturday 21 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

Midday of Sunday 22 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 00:24 on Sat 21 Oct to 02:41 on Sun 22 Oct.

    1939-10-20T16:23:56Z → 1939-10-21T18:40:56Z

  2. 02

    Kāla

    Madhyāhna is 1 ghaṭikā either side of midday: 11:01–11:49 on the 21st, 11:00–11:48 on the 22nd.

    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 21st and 0 of 48 on the 22nd.

    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 29965 s

  5. 05

    Ruling

    Mahānavamī, Daqing, 1939: Saturday 21 October.

    confidence: determinate

Say it like this

In Daqing, Mahānavamī 1939 falls on Saturday 21 October. Navamī runs from 00:24 on Sat 21 Oct to 02:41 on Sun 22 Oct and covers all of madhyāhna that midday.

ahargana.org/daqing/festivals/1939/mahanavami · pac-rp@2026.1

Who says what

AuthorityKindDate
Ahargaṇa, pac-rpThis rulingSat 21 Oct
Ahargaṇa, classicalDisc centre, no refractionSat 21 Oct
compat-drikpanchangComparison profileSat 21 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 20thCoveredMadhyāhna 21stCoveredRuled
Los Angeles08:24 → 10:4111:1448 min11:130 min20 Oct
Chicago10:24 → 12:4111:1148 min11:1148 min20 Oct
Jersey City11:24 → 13:4111:1741 min11:1748 min20 Oct
Port of Spain12:24 → 14:4111:270 min11:2748 min21 Oct
London17:24 → 19:4112:210 min12:2148 min21 Oct
Durban18:24 → 20:4111:170 min11:1748 min21 Oct
Dubai20:24 → 22:4111:400 min11:3948 min21 Oct
Delhi21:54 → 00:1111:420 min11:4248 min21 Oct
Kolkata21:54 → 00:1110:570 min10:5748 min21 Oct
Singapore23:44 → 02:0111:460 min11:4548 min21 Oct
Sydney02:24 → 04:4111:160 min11:1648 min21 Oct
Suva04:24 → 06:4111:270 min11:2748 min21 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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