Ruling · Mahānavamī · 1912

Saturday 19 October

Determinatein Daqing, under the Rashtriya Panchang method. Clear of every threshold by 555 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 19 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 20 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

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

How it was decided

  1. 01

    Aṅga

    Navamī runs from 23:17 on Fri 18 Oct to 01:46 on Sun 20 Oct.

    1912-10-18T15:16:36Z → 1912-10-19T17:45:50Z

  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 48 of 48 minutes on the 19th and 0 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 33285 s

  5. 05

    Ruling

    Mahānavamī, Daqing, 1912: Saturday 19 October.

    confidence: determinate

Say it like this

In Daqing, Mahānavamī 1912 falls on Saturday 19 October. Navamī runs from 23:17 on Fri 18 Oct to 01:46 on Sun 20 Oct and covers all of madhyāhna that midday.

ahargana.org/daqing/festivals/1912/mahanavami · pac-rp@2026.1

Who says what

AuthorityKindDate
Ahargaṇa, pac-rpThis rulingSat 19 Oct
Ahargaṇa, classicalDisc centre, no refractionSat 19 Oct
compat-drikpanchangComparison profileSat 19 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 18thCoveredMadhyāhna 19thCoveredRuled
Los Angeles07:17 → 09:4611:1448 min11:140 min18 Oct
Chicago09:17 → 11:4611:1148 min11:1135 min18 Oct
Jersey City10:17 → 12:4611:1748 min11:1748 min18 Oct
Port of Spain11:17 → 13:4611:2748 min11:2748 min18 Oct
London15:17 → 17:4611:210 min11:2148 min19 Oct
Durban17:17 → 19:4611:170 min11:1748 min19 Oct
Dubai18:58 → 21:2711:210 min11:2148 min19 Oct
Delhi20:47 → 23:1611:420 min11:4248 min19 Oct
Kolkata20:47 → 23:1610:580 min10:5848 min19 Oct
Singapore22:17 → 00:4611:260 min11:2648 min19 Oct
Sydney01:17 → 03:4611:170 min11:1748 min19 Oct
Suva03:12 → 05:4111:230 min11:2348 min19 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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