Ruling · Mahānavamī · 2028

Tuesday 26 September

Determinatein Daqing, under the Rashtriya Panchang method. Clear of every threshold by 27 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 Tuesday 26 September

Taken. The only midday Navamī reaches.

madhyāhna begins 11:07  11:55 madhyāhna ends
10:1910:4311:0711:3111:5512:1912:43

48 of 48 minutes covered

Midday of Wednesday 27 September

Navamī is absent from madhyāhna. Not taken.

madhyāhna begins 11:07  11:55 madhyāhna ends
Navamī ends 10:39:26
10:1910:4311:0711:3111:5512:1912:43

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 09:29 on Tue 26 Sep to 10:39 on Wed 27 Sep.

    2028-09-26T01:28:57Z → 2028-09-27T02:39:26Z

  2. 02

    Kāla

    Madhyāhna is 1 ghaṭikā either side of midday: 11:07–11:55 on the 26th, 11:07–11:55 on the 27th.

    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 26th and 0 of 48 on the 27th.

    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 1625 s

  5. 05

    Ruling

    Mahānavamī, Daqing, 2028: Tuesday 26 September.

    confidence: determinate

Say it like this

In Daqing, Mahānavamī 2028 falls on Tuesday 26 September. Navamī runs from 09:29 on Tue 26 Sep to 10:39 on Wed 27 Sep and covers all of madhyāhna that midday.

ahargana.org/daqing/festivals/2028/mahanavami · pac-rp@2026.1

Who says what

AuthorityKindDate
Ahargaṇa, pac-rpThis rulingTue 26 Sep
Ahargaṇa, classicalDisc centre, no refractionTue 26 Sep
compat-drikpanchangComparison profileTue 26 Sep
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 26thCoveredMadhyāhna 27thCoveredRuled
Los Angeles18:29 → 19:3912:2048 min12:190 min26 Sep
Chicago20:29 → 21:3912:1748 min12:170 min26 Sep
Jersey City21:29 → 22:3912:2348 min12:230 min26 Sep
Port of Spain21:29 → 22:3911:3348 min11:330 min26 Sep
London02:29 → 03:3912:2748 min12:270 min26 Sep
Durban03:29 → 04:3911:2348 min11:230 min26 Sep
Dubai05:29 → 06:3911:4648 min11:450 min26 Sep
Delhi06:59 → 08:0911:4848 min11:480 min26 Sep
Kolkata06:59 → 08:0911:0448 min11:030 min26 Sep
Singapore09:29 → 10:3912:3248 min12:310 min26 Sep
Sydney11:29 → 12:3911:2342 min11:2248 min26 Sep
Suva13:29 → 14:3911:340 min11:3348 min27 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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