Ruling · Mahānavamī · 2029

Monday 15 October

Determinatein Daqing, under the Rashtriya Panchang method. Clear of every threshold by 233 minutes.

Decide it for

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 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 Tuesday 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 06:59 on Mon 15 Oct to 07:09 on Tue 16 Oct.

    2029-10-14T22:58:58Z → 2029-10-15T23:08:32Z

  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 13961 s

  5. 05

    Ruling

    Mahānavamī, Daqing, 2029: Monday 15 October.

    confidence: determinate

Say it like this

In Daqing, Mahānavamī 2029 falls on Monday 15 October. Navamī runs from 06:59 on Mon 15 Oct to 07:09 on Tue 16 Oct and covers all of madhyāhna that midday.

ahargana.org/daqing/festivals/2029/mahanavami · pac-rp@2026.1

Who says what

AuthorityKindDate
Ahargaṇa, pac-rpThis rulingMon 15 Oct
Ahargaṇa, classicalDisc centre, no refractionMon 15 Oct
compat-drikpanchangComparison profileMon 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 Angeles15:59 → 16:0912:150 min12:1448 min15 Oct
Chicago17:59 → 18:0912:120 min12:1248 min15 Oct
Jersey City18:59 → 19:0912:180 min12:1848 min15 Oct
Port of Spain18:59 → 19:0911:280 min11:2848 min15 Oct
London23:59 → 00:0912:220 min12:2248 min15 Oct
Durban00:59 → 01:0911:180 min11:1848 min15 Oct
Dubai02:59 → 03:0911:410 min11:4048 min15 Oct
Delhi04:29 → 04:3911:430 min11:4348 min15 Oct
Kolkata04:29 → 04:3910:580 min10:5848 min15 Oct
Singapore06:59 → 07:0912:270 min12:2648 min15 Oct
Sydney09:59 → 10:0912:170 min12:1748 min15 Oct
Suva10:59 → 11:0911:280 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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