Ruling · Dyūta Pratipad · 1980

Saturday 8 November

Boundaryin Daqing, under the Rashtriya Panchang method. Both forenoons qualify and the rule does not say which to take. Say “contested”.

Decide it for

46°35′ N 125°00′ E · Asia/Shanghai · GeoNames 2037860

The two forenoons

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

Forenoon of Saturday 8 November

Taken. Both forenoons qualify; the rule is silent, and this one is covered longer.

06:32 sunrisepūrvāhṇa ends 09:46
06:0806:5607:4408:3209:2010:08

194 of 194 minutes covered

Forenoon of Sunday 9 November

Qualifies with 17 of 193 minutes. Not taken.

06:33 sunrisepūrvāhṇa ends 09:47
Pratipadā ends 06:50:10
06:0906:5707:4508:3309:2110:09

17 of 193 minutes covered, the first 17

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

How it was decided

  1. 01

    Aṅga

    Pratipadā runs from 04:43 on Sat 8 Nov to 06:50 on Sun 9 Nov.

    1980-11-07T20:42:32Z → 1980-11-08T22:50:11Z

  2. 02

    Kāla

    Pūrvāhṇa is first 5 of 15 day muhūrtas: 06:32–09:46 on the 8th, 06:33–09:47 on the 9th.

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

  3. 03

    Rule

    Pratipadā must be present during pūrvāhṇa. It covers 194 of 194 minutes on the 8th and 17 of 193 on the 9th.

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

  4. 04

    Tie-break

    Both forenoons qualify and the rule marks neither. The one covered longer is ruled, as a boundary.

    priority: unstated → greater-coverage · margin 1007 s

  5. 05

    Ruling

    Dyūta Pratipad, Daqing, 1980: Saturday 8 November.

    confidence: boundary (tie-break-unstated)

Say it like this

In Daqing, Dyūta Pratipad 1980 falls on Saturday 8 November. Pratipadā runs from 04:43 on Sat 8 Nov to 06:50 on Sun 9 Nov and covers all of pūrvāhṇa that forenoon. It also reaches the next forenoon for 17 minutes; the rule does not say which to take, and the one covered longer is ruled: treat the date as contested.

ahargana.org/daqing/festivals/1980/dyuta-pratipad · pac-rp@2026.1

Who says what

AuthorityKindDate
Ahargaṇa, pac-rpThis rulingSat 8 Nov
Ahargaṇa, classicalDisc centre, no refractionSat 8 Nov
compat-drikpanchangComparison profileSat 8 Nov
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/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 7thCoveredSunrise 8thCoveredRuled
Los Angeles12:43 → 14:5006:190 min06:20211 min8 Nov
Chicago14:43 → 16:5006:310 min06:32201 min8 Nov
Jersey City15:43 → 17:5006:340 min06:36203 min8 Nov
Port of Spain16:43 → 18:5005:590 min05:59234 min8 Nov
London20:43 → 22:5007:050 min07:07185 min8 Nov
Durban22:43 → 00:5004:570 min04:56269 min8 Nov
Dubai00:43 → 02:5006:300 min06:31221 min8 Nov
Delhi02:13 → 04:2006:380 min06:39217 min8 Nov
Kolkata02:13 → 04:2005:450 min05:45223 min8 Nov
Singapore04:13 → 06:2006:170 min06:17241 min8 Nov
Sydney07:43 → 09:5005:500 min05:49160 min9 Nov
Suva08:43 → 10:5005:250 min05:2459 min9 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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