Ruling · Mahānavamī · 1904

Monday 17 October

Determinatein Baoding, under the Rashtriya Panchang method. Clear of every threshold by 426 minutes.

Decide it for

BaodingDelhiKolkataSingaporeSydneyJersey City

38°52′ N 115°28′ E · Asia/Shanghai · GeoNames 1816971

The two middays

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

Midday of Monday 17 October

Taken. The only midday Navamī reaches.

madhyāhna begins 11:39  12:27 madhyāhna ends
10:5111:1511:3912:0312:2712:5113:15

48 of 48 minutes covered

Midday of Tuesday 18 October

Navamī is absent from madhyāhna. Not taken.

madhyāhna begins 11:39  12:27 madhyāhna ends
10:5111:1511:3912:0312:2712:5113:15

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 02:38 on Mon 17 Oct to 04:33 on Tue 18 Oct.

    1904-10-16T18:37:40Z → 1904-10-17T20:33:12Z

  2. 02

    Kāla

    Madhyāhna is 1 ghaṭikā either side of midday: 11:39–12:27 on the 17th, 11:39–12:27 on the 18th.

    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 17th and 0 of 48 on the 18th.

    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 25560 s

  5. 05

    Ruling

    Mahānavamī, Baoding, 1904: Monday 17 October.

    confidence: determinate

Say it like this

In Baoding, Mahānavamī 1904 falls on Monday 17 October. Navamī runs from 02:38 on Mon 17 Oct to 04:33 on Tue 18 Oct and covers all of madhyāhna that midday.

ahargana.org/baoding/festivals/1904/mahanavami · pac-rp@2026.1

Who says what

AuthorityKindDate
Ahargaṇa, pac-rpThis rulingMon 17 Oct
Ahargaṇa, classicalDisc centre, no refractionMon 17 Oct
compat-drikpanchangComparison profileMon 17 Oct
No institution has a recorded ruling for Baoding.

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 16thCoveredMadhyāhna 17thCoveredRuled
Los Angeles10:38 → 12:3311:1448 min11:1448 min16 Oct
Chicago12:38 → 14:3311:120 min11:1248 min17 Oct
Jersey City13:38 → 15:3311:180 min11:1748 min17 Oct
Port of Spain14:38 → 16:3311:280 min11:2748 min17 Oct
London18:38 → 20:3311:220 min11:2248 min17 Oct
Durban20:38 → 22:3311:180 min11:1848 min17 Oct
Dubai22:19 → 00:1411:210 min11:2148 min17 Oct
Delhi23:59 → 01:5411:340 min11:3348 min17 Oct
Kolkata23:59 → 01:5410:490 min10:4948 min17 Oct
Singapore01:33 → 03:2811:210 min11:2148 min17 Oct
Sydney04:38 → 06:3311:170 min11:1748 min17 Oct
Suva06:33 → 08:2811:230 min11:2348 min17 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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