Ruling · Mahānavamī · 1924

Monday 6 October

Determinatein Daqing, under the Rashtriya Panchang method. Clear of every threshold by 92 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 Monday 6 October

Taken. The only midday Navamī reaches.

madhyāhna begins 11:04  11:52 madhyāhna ends
10:1610:4011:0411:2811:5212:1612:40

48 of 48 minutes covered

Midday of Tuesday 7 October

Navamī is absent from madhyāhna. Not taken.

madhyāhna begins 11:04  11:52 madhyāhna ends
10:1610:4011:0411:2811:5212:1612:40

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 09:32 on Mon 6 Oct to 07:49 on Tue 7 Oct.

    1924-10-06T01:31:45Z → 1924-10-06T23:48:47Z

  2. 02

    Kāla

    Madhyāhna is 1 ghaṭikā either side of midday: 11:04–11:52 on the 6th, 11:04–11:52 on the 7th.

    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 6th and 0 of 48 on the 7th.

    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 5528 s

  5. 05

    Ruling

    Mahānavamī, Daqing, 1924: Monday 6 October.

    confidence: determinate

Say it like this

In Daqing, Mahānavamī 1924 falls on Monday 6 October. Navamī runs from 09:32 on Mon 6 Oct to 07:49 on Tue 7 Oct and covers all of madhyāhna that midday.

ahargana.org/daqing/festivals/1924/mahanavami · pac-rp@2026.1

Who says what

AuthorityKindDate
Ahargaṇa, pac-rpThis rulingMon 6 Oct
Ahargaṇa, classicalDisc centre, no refractionMon 6 Oct
compat-drikpanchangComparison profileMon 6 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 6thCoveredMadhyāhna 7thCoveredRuled
Los Angeles17:32 → 15:4911:1748 min11:170 min6 Oct
Chicago19:32 → 17:4911:1448 min11:140 min6 Oct
Jersey City20:32 → 18:4911:2048 min11:200 min6 Oct
Port of Spain21:32 → 19:4911:3048 min11:300 min6 Oct
London01:32 → 23:4911:2448 min11:240 min6 Oct
Durban03:32 → 01:4911:2048 min11:200 min6 Oct
Dubai05:32 → 03:4911:4348 min11:430 min6 Oct
Delhi07:02 → 05:1911:4548 min11:450 min6 Oct
Kolkata07:02 → 05:1911:0148 min11:000 min6 Oct
Singapore08:32 → 06:4911:2948 min11:290 min6 Oct
Sydney11:32 → 09:4911:2036 min11:190 min6 Oct
Suva13:32 → 11:4911:310 min11:3018 min7 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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