Ruling · Mahānavamī · 2048

Thursday 15 October

Determinatein Daqing, under the Rashtriya Panchang method. Clear of every threshold by 217 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 15 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 Friday 16 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 07:24 on Thu 15 Oct to 05:44 on Fri 16 Oct.

    2048-10-14T23:24:30Z → 2048-10-15T21:44:04Z

  2. 02

    Kāla

    Madhyāhna is 1 ghaṭikā either side of midday: 11:01–11:49 on the 15th, 11:01–11:49 on the 16th.

    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 15th and 0 of 48 on the 16th.

    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 13013 s

  5. 05

    Ruling

    Mahānavamī, Daqing, 2048: Thursday 15 October.

    confidence: determinate

Say it like this

In Daqing, Mahānavamī 2048 falls on Thursday 15 October. Navamī runs from 07:24 on Thu 15 Oct to 05:44 on Fri 16 Oct and covers all of madhyāhna that midday.

ahargana.org/daqing/festivals/2048/mahanavami · pac-rp@2026.1

Who says what

AuthorityKindDate
Ahargaṇa, pac-rpThis rulingThu 15 Oct
Ahargaṇa, classicalDisc centre, no refractionThu 15 Oct
compat-drikpanchangComparison profileThu 15 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 14thCoveredMadhyāhna 15thCoveredRuled
Los Angeles16:24 → 14:4412:150 min12:1448 min15 Oct
Chicago18:24 → 16:4412:120 min12:1248 min15 Oct
Jersey City19:24 → 17:4412:180 min12:1848 min15 Oct
Port of Spain19:24 → 17:4411:280 min11:2848 min15 Oct
London00:24 → 22:4412:220 min12:2248 min15 Oct
Durban01:24 → 23:4411:180 min11:1848 min15 Oct
Dubai03:24 → 01:4411:410 min11:4048 min15 Oct
Delhi04:54 → 03:1411:430 min11:4348 min15 Oct
Kolkata04:54 → 03:1410:580 min10:5848 min15 Oct
Singapore07:24 → 05:4412:270 min12:2648 min15 Oct
Sydney10:24 → 08:4412:170 min12:1748 min15 Oct
Suva11:24 → 09:4411:280 min11:2848 min15 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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