Ruling · Mahānavamī · 2054

Friday 9 October

Boundaryin Baoding, under the Rashtriya Panchang method. A threshold is only 0 min 42 s away. Say “contested”.

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 Friday 9 October

Taken. Both middays qualify; the rule takes the first.

madhyāhna begins 11:41  12:29 madhyāhna ends
10:5311:1711:4112:0512:2912:5313:17

48 of 48 minutes covered

Midday of Saturday 10 October

Qualifies with 48 of 48 minutes. Not taken.

madhyāhna begins 11:41  12:29 madhyāhna ends
Navamī ends 12:29:39
10:5311:1711:4112:0512:2912:5313:17

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 10:15 on Fri 9 Oct to 12:30 on Sat 10 Oct.

    2054-10-09T02:15:14Z → 2054-10-10T04:29:39Z

  2. 02

    Kāla

    Madhyāhna is 1 ghaṭikā either side of midday: 11:41–12:29 on the 9th, 11:41–12:29 on the 10th.

    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 9th and 48 of 48 on the 10th.

    Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 104

  4. 04

    Tie-break

    Both middays qualify. Pūrvaviddhā: the first is taken.

    priority: purvaviddha → purvaviddha · margin 42 s < 300 s

  5. 05

    Ruling

    Mahānavamī, Baoding, 2054: Friday 9 October.

    confidence: boundary (margin)

Say it like this

In Baoding, Mahānavamī 2054 falls on Friday 9 October. Navamī runs from 10:15 on Fri 9 Oct to 12:30 on Sat 10 Oct and covers all of madhyāhna that midday. It also reaches the next midday for 48 minutes; by the rule the first midday is taken. It is 0 min 42 s from a threshold: treat the date as contested.

ahargana.org/baoding/festivals/2054/mahanavami · pac-rp@2026.1

Who says what

AuthorityKindDate
Ahargaṇa, pac-rpThis rulingFri 9 Oct
Ahargaṇa, classicalDisc centre, no refractionFri 9 Oct
compat-drikpanchangComparison profileFri 9 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 9thCoveredMadhyāhna 10thCoveredRuled
Los Angeles19:15 → 21:3012:1648 min12:160 min9 Oct
Chicago21:15 → 23:3012:1348 min12:130 min9 Oct
Jersey City22:15 → 00:3012:1948 min12:190 min9 Oct
Port of Spain22:15 → 00:3011:2948 min11:290 min9 Oct
London03:15 → 05:3012:2348 min12:230 min9 Oct
Durban04:15 → 06:3011:1948 min11:190 min9 Oct
Dubai06:15 → 08:3011:4248 min11:420 min9 Oct
Delhi07:45 → 10:0011:4448 min11:440 min9 Oct
Kolkata07:45 → 10:0011:0048 min10:590 min9 Oct
Singapore10:15 → 12:3012:2848 min12:282 min9 Oct
Sydney13:15 → 15:3012:190 min12:1948 min10 Oct
Suva14:15 → 16:3011:300 min11:3048 min10 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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