Ruling · Mahānavamī · 2074

Saturday 29 September

Boundaryin Daegu, under the Rashtriya Panchang method. A threshold is only 1 min 43 s away. Say “contested”.

Decide it for

DaeguDelhiKolkataSingaporeSydneyJersey City

35°52′ N 128°36′ E · Asia/Seoul · GeoNames 1835329

The two middays

One ghaṭī is 24 minutes. Madhyāhna is 1 ghaṭikā either side of midday.

Midday of Friday 28 September

Navamī is absent from madhyāhna. Not taken.

madhyāhna begins 11:52  12:40 madhyāhna ends
11:0411:2811:5212:1612:4013:0413:28

0 of 48 minutes covered

Midday of Saturday 29 September

Taken. The only midday Navamī reaches.

madhyāhna begins 11:52  12:40 madhyāhna ends
Navamī ends 12:41:33
11:0411:2811:5212:1612:4013:0413:28

48 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 14:08 on Fri 28 Sep to 12:42 on Sat 29 Sep.

    2074-09-28T05:08:21Z → 2074-09-29T03:41:33Z

  2. 02

    Kāla

    Madhyāhna is 1 ghaṭikā either side of midday: 11:52–12:40 on the 28th, 11:52–12:40 on the 29th.

    madhyahna: midday-pm-1-ghatika · sunrise and sunset: upper limb, 31′ + 16′

  3. 03

    Rule

    Navamī must be present during madhyāhna. It covers 0 of 48 minutes on the 28th and 48 of 48 on the 29th.

    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 103 s < 300 s

  5. 05

    Ruling

    Mahānavamī, Daegu, 2074: Saturday 29 September.

    confidence: boundary (margin)

Say it like this

In Daegu, Mahānavamī 2074 falls on Saturday 29 September. Navamī runs from 14:08 on Fri 28 Sep to 12:42 on Sat 29 Sep and covers all of madhyāhna that midday. It is 1 min 43 s from a threshold: treat the date as contested.

ahargana.org/daegu/festivals/2074/mahanavami · pac-rp@2026.1

Who says what

AuthorityKindDate
Ahargaṇa, pac-rpThis rulingSat 29 Sep
Ahargaṇa, classicalDisc centre, no refractionSat 29 Sep
compat-drikpanchangComparison profileSat 29 Sep
No institution has a recorded ruling for Daegu.

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 28thCoveredMadhyāhna 29thCoveredRuled
Los Angeles22:08 → 20:4212:1948 min12:190 min28 Sep
Chicago00:08 → 22:4212:1748 min12:170 min28 Sep
Jersey City01:08 → 23:4212:2348 min12:220 min28 Sep
Port of Spain01:08 → 23:4211:3348 min11:320 min28 Sep
London06:08 → 04:4212:2748 min12:260 min28 Sep
Durban07:08 → 05:4211:2348 min11:230 min28 Sep
Dubai09:08 → 07:4211:4548 min11:450 min28 Sep
Delhi10:38 → 09:1211:4848 min11:470 min28 Sep
Kolkata10:38 → 09:1211:0348 min11:030 min28 Sep
Singapore13:08 → 11:4212:3111 min12:310 min28 Sep
Sydney15:08 → 13:4211:220 min11:2248 min29 Sep
Suva17:08 → 15:4211:330 min11:3348 min29 Sep
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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