Ruling · Mahānavamī · 2097

Monday 14 October

Determinatein Daqing, under the Rashtriya Panchang method. Clear of every threshold by 126 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 14 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 Tuesday 15 October

Navamī is absent from madhyāhna. Not taken.

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

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 06:48 on Mon 14 Oct to 08:56 on Tue 15 Oct.

    2097-10-13T22:48:21Z → 2097-10-15T00:56:08Z

  2. 02

    Kāla

    Madhyāhna is 1 ghaṭikā either side of midday: 11:02–11:50 on the 14th, 11:02–11:50 on the 15th.

    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 14th and 0 of 48 on the 15th.

    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 7533 s

  5. 05

    Ruling

    Mahānavamī, Daqing, 2097: Monday 14 October.

    confidence: determinate

Say it like this

In Daqing, Mahānavamī 2097 falls on Monday 14 October. Navamī runs from 06:48 on Mon 14 Oct to 08:56 on Tue 15 Oct and covers all of madhyāhna that midday.

ahargana.org/daqing/festivals/2097/mahanavami · pac-rp@2026.1

Who says what

AuthorityKindDate
Ahargaṇa, pac-rpThis rulingMon 14 Oct
Ahargaṇa, classicalDisc centre, no refractionMon 14 Oct
compat-drikpanchangComparison profileMon 14 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 13thCoveredMadhyāhna 15thCoveredRuled
Los Angeles15:48 → 17:5612:150 min12:150 min14 Oct
Chicago17:48 → 19:5612:130 min12:120 min14 Oct
Jersey City18:48 → 20:5612:180 min12:180 min14 Oct
Port of Spain18:48 → 20:5611:280 min11:280 min14 Oct
London23:48 → 01:5612:220 min12:220 min14 Oct
Durban00:48 → 02:5611:190 min11:180 min14 Oct
Dubai02:48 → 04:5611:410 min11:410 min14 Oct
Delhi04:18 → 06:2611:430 min11:430 min14 Oct
Kolkata04:18 → 06:2610:590 min10:580 min14 Oct
Singapore06:48 → 08:5612:270 min12:270 min14 Oct
Sydney09:48 → 11:5612:180 min12:180 min14 Oct
Suva10:48 → 12:5611:290 min11:2948 min14 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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