Ruling · Mahānavamī · 1915

Saturday 16 October

Determinatein Daqing, under the Rashtriya Panchang method. Clear of every threshold by 119 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 16 October

Taken. The only midday Navamī reaches.

madhyāhna begins 11:02  11:50 madhyāhna ends
10:1410:3811:0211:2611:5012:1412:38

48 of 48 minutes covered

Midday of Sunday 17 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 09:03 on Sat 16 Oct to 07:44 on Sun 17 Oct.

    1915-10-16T01:02:36Z → 1915-10-16T23:44:30Z

  2. 02

    Kāla

    Madhyāhna is 1 ghaṭikā either side of midday: 11:02–11:50 on the 16th, 11:01–11:49 on the 17th.

    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 16th and 0 of 48 on the 17th.

    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 7136 s

  5. 05

    Ruling

    Mahānavamī, Daqing, 1915: Saturday 16 October.

    confidence: determinate

Say it like this

In Daqing, Mahānavamī 1915 falls on Saturday 16 October. Navamī runs from 09:03 on Sat 16 Oct to 07:44 on Sun 17 Oct and covers all of madhyāhna that midday.

ahargana.org/daqing/festivals/1915/mahanavami · pac-rp@2026.1

Who says what

AuthorityKindDate
Ahargaṇa, pac-rpThis rulingSat 16 Oct
Ahargaṇa, classicalDisc centre, no refractionSat 16 Oct
compat-drikpanchangComparison profileSat 16 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 16thCoveredMadhyāhna 17thCoveredRuled
Los Angeles17:03 → 15:4411:1448 min11:140 min16 Oct
Chicago19:03 → 17:4411:1248 min11:120 min16 Oct
Jersey City20:03 → 18:4411:1848 min11:180 min16 Oct
Port of Spain21:03 → 19:4411:2848 min11:280 min16 Oct
London01:03 → 23:4411:2248 min11:220 min16 Oct
Durban03:03 → 01:4411:1848 min11:180 min16 Oct
Dubai04:44 → 03:2511:2148 min11:210 min16 Oct
Delhi06:33 → 05:1411:4348 min11:430 min16 Oct
Kolkata06:33 → 05:1410:5848 min10:580 min16 Oct
Singapore08:03 → 06:4411:2648 min11:260 min16 Oct
Sydney11:03 → 09:4411:1748 min11:170 min16 Oct
Suva12:58 → 11:3911:230 min11:2316 min17 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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