Ruling · Dyūta Pratipad · 1931

Tuesday 10 November

Boundaryin Baoding, under the Rashtriya Panchang method. A threshold is only 1 min 13 s away. Say “contested”.

Decide it for

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

The two forenoons

One ghaṭī is 24 minutes. Pūrvāhṇa is first 5 of 15 day muhūrtas.

Forenoon of Tuesday 10 November

Taken. The only forenoon Pratipadā reaches.

06:54 sunrisepūrvāhṇa ends 10:19
Pratipadā begins 06:55:15
06:3007:1808:0608:5409:4210:30

204 of 205 minutes covered, the last 204

Forenoon of Wednesday 11 November

Pratipadā is absent from pūrvāhṇa. Not taken.

06:55 sunrisepūrvāhṇa ends 10:20
06:3107:1908:0708:5509:4310:31

0 of 204 minutes covered

Pratipadā presentPūrvāhṇa, the window the rule readsThe instant the tithi begins or ends

How it was decided

  1. 01

    Aṅga

    Pratipadā runs from 06:55 on Tue 10 Nov to 03:45 on Wed 11 Nov.

    1931-11-09T22:55:16Z → 1931-11-10T19:45:15Z

  2. 02

    Kāla

    Pūrvāhṇa is first 5 of 15 day muhūrtas: 06:54–10:19 on the 10th, 06:55–10:20 on the 11th.

    purvahna: day-muhurta-1-5 · sunrise and sunset: upper limb, 31′ + 16′

  3. 03

    Rule

    Pratipadā must be present during pūrvāhṇa. It covers 204 of 205 minutes on the 10th and 0 of 204 on the 11th.

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

  4. 04

    Tie-break

    Only one forenoon qualifies. No tie-break is needed.

    priority: unstated → only-day · margin 73 s < 300 s

  5. 05

    Ruling

    Dyūta Pratipad, Baoding, 1931: Tuesday 10 November.

    confidence: boundary (margin)

Say it like this

In Baoding, Dyūta Pratipad 1931 falls on Tuesday 10 November. Pratipadā runs from 06:55 on Tue 10 Nov to 03:45 on Wed 11 Nov and covers 204 of 205 minutes of pūrvāhṇa that forenoon. It is 1 min 13 s from a threshold: treat the date as contested.

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

Who says what

AuthorityKindDate
Ahargaṇa, pac-rpThis rulingTue 10 Nov
Ahargaṇa, classicalDisc centre, no refractionTue 10 Nov
compat-drikpanchangComparison profileTue 10 Nov
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/dyuta-pratipad · ruleset 2026.3-draft

Month
Kārtika, amānta
Pakṣa · aṅga
Śukla · Pratipadā
Kāla
Pūrvāhṇa
Priority
Unstated
Tie-break
Longer coverage, as a boundary
Reference
CRC 1955, p. 104

“S 1 Govardhana puja, Annakuta [purvaviddha], Balidaityaraja puja (pradosa), Dyuta pratipad (purvahna).” Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 104.

The same rule, elsewhere

Twelve places, west to east. Local clock times.

PlacePratipadāSunrise 9thCoveredSunrise 10thCoveredRuled
Los Angeles14:55 → 11:4506:200 min06:21211 min10 Nov
Chicago16:55 → 13:4506:320 min06:33201 min10 Nov
Jersey City17:55 → 14:4506:350 min06:37202 min10 Nov
Port of Spain18:55 → 15:4505:590 min06:00233 min10 Nov
London22:55 → 19:4507:070 min07:09184 min10 Nov
Durban00:55 → 21:4504:570 min04:56269 min10 Nov
Dubai02:55 → 23:4506:310 min06:32221 min10 Nov
Delhi04:25 → 01:1506:380 min06:39217 min10 Nov
Kolkata04:25 → 01:1505:450 min05:46223 min10 Nov
Singapore05:55 → 02:4505:470 min05:47233 min10 Nov
Sydney08:55 → 05:4504:490 min04:4827 min11 Nov
Suva10:55 → 07:4505:240 min05:240 min11 Nov
Profile · tradition
pac-rp@2026.1 · smarta
Rule
dyuta-pratipad@2026.3-draft
Engine · kernel
0.1.0 · de440 7eef…ea74
Boundary margin
300 s

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