Ruling · Mahānavamī · 2001

Thursday 25 October

Determinatein Daqing, under the Rashtriya Panchang method. Clear of every threshold by 510 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 Thursday 25 October

Taken. The only midday Navamī reaches.

madhyāhna begins 11:00  11:48 madhyāhna ends
10:1210:3611:0011:2411:4812:1212:36

48 of 48 minutes covered

Midday of Friday 26 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 00:04 on Thu 25 Oct to 02:30 on Fri 26 Oct.

    2001-10-24T16:04:11Z → 2001-10-25T18:29:56Z

  2. 02

    Kāla

    Madhyāhna is 1 ghaṭikā either side of midday: 11:00–11:48 on the 25th, 11:00–11:48 on the 26th.

    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 25th and 0 of 48 on the 26th.

    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 30585 s

  5. 05

    Ruling

    Mahānavamī, Daqing, 2001: Thursday 25 October.

    confidence: determinate

Say it like this

In Daqing, Mahānavamī 2001 falls on Thursday 25 October. Navamī runs from 00:04 on Thu 25 Oct to 02:30 on Fri 26 Oct and covers all of madhyāhna that midday.

ahargana.org/daqing/festivals/2001/mahanavami · pac-rp@2026.1

Who says what

AuthorityKindDate
Ahargaṇa, pac-rpThis rulingThu 25 Oct
Ahargaṇa, classicalDisc centre, no refractionThu 25 Oct
compat-drikpanchangComparison profileThu 25 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 24thCoveredMadhyāhna 25thCoveredRuled
Los Angeles09:04 → 11:3012:1348 min12:130 min24 Oct
Chicago11:04 → 13:3012:1048 min12:1048 min24 Oct
Jersey City12:04 → 14:3012:1648 min12:1648 min24 Oct
Port of Spain12:04 → 14:3011:2610 min11:2648 min24 Oct
London17:04 → 19:3012:200 min12:2048 min25 Oct
Durban18:04 → 20:3011:160 min11:1648 min25 Oct
Dubai20:04 → 22:3011:390 min11:3948 min25 Oct
Delhi21:34 → 00:0011:410 min11:4148 min25 Oct
Kolkata21:34 → 00:0010:570 min10:5748 min25 Oct
Singapore00:04 → 02:3012:250 min12:2548 min25 Oct
Sydney02:04 → 04:3011:160 min11:1648 min25 Oct
Suva04:04 → 06:3011:270 min11:2748 min25 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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