Ruling · Mahānavamī · 1931

Monday 19 October

Determinatein Baoding, under the Rashtriya Panchang method. Clear of every threshold by 281 minutes.

Decide it for

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 19 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 20 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 05:42 on Mon 19 Oct to 06:58 on Tue 20 Oct.

    1931-10-18T21:41:50Z → 1931-10-19T22:58:23Z

  2. 02

    Kāla

    Madhyāhna is 1 ghaṭikā either side of midday: 11:39–12:27 on the 19th, 11:39–12:27 on the 20th.

    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 19th and 0 of 48 on the 20th.

    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 16833 s

  5. 05

    Ruling

    Mahānavamī, Baoding, 1931: Monday 19 October.

    confidence: determinate

Say it like this

In Baoding, Mahānavamī 1931 falls on Monday 19 October. Navamī runs from 05:42 on Mon 19 Oct to 06:58 on Tue 20 Oct and covers all of madhyāhna that midday.

ahargana.org/baoding/festivals/1931/mahanavami · pac-rp@2026.1

Who says what

AuthorityKindDate
Ahargaṇa, pac-rpThis rulingMon 19 Oct
Ahargaṇa, classicalDisc centre, no refractionMon 19 Oct
compat-drikpanchangComparison profileMon 19 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 18thCoveredMadhyāhna 19thCoveredRuled
Los Angeles13:42 → 14:5811:140 min11:1448 min19 Oct
Chicago15:42 → 16:5811:120 min11:1148 min19 Oct
Jersey City16:42 → 17:5811:170 min11:1748 min19 Oct
Port of Spain17:42 → 18:5811:270 min11:2748 min19 Oct
London21:42 → 22:5811:210 min11:2148 min19 Oct
Durban23:42 → 00:5811:180 min11:1748 min19 Oct
Dubai01:42 → 02:5811:400 min11:4048 min19 Oct
Delhi03:12 → 04:2811:420 min11:4248 min19 Oct
Kolkata03:12 → 04:2810:580 min10:5848 min19 Oct
Singapore04:42 → 05:5811:260 min11:2648 min19 Oct
Sydney07:42 → 08:5811:170 min11:1748 min19 Oct
Suva09:42 → 10:5811:280 min11:2848 min19 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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