Ruling · Dyūta Pratipad · 1946

Saturday 26 October

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 Friday 25 October

Qualifies with 128 of 209 minutes. Not taken.

06:10 sunrisepūrvāhṇa ends 09:39
Pratipadā begins 07:31:48
05:4606:3407:2208:1008:5809:46

128 of 209 minutes covered, the last 128

Forenoon of Saturday 26 October

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

06:12 sunrisepūrvāhṇa ends 09:40
Pratipadā ends 09:09:23
05:4806:3607:2408:1209:0009:48

177 of 208 minutes covered, the first 177

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

How it was decided

  1. 01

    Aṅga

    Pratipadā runs from 07:32 on Fri 25 Oct to 09:09 on Sat 26 Oct.

    1946-10-24T23:31:48Z → 1946-10-26T01:09:24Z

  2. 02

    Kāla

    Pūrvāhṇa is first 5 of 15 day muhūrtas: 06:10–09:39 on the 25th, 06:12–09:40 on the 26th.

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

  3. 03

    Rule

    Pratipadā must be present during pūrvāhṇa. It covers 128 of 209 minutes on the 25th and 177 of 208 on the 26th.

    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 1826 s

  5. 05

    Ruling

    Dyūta Pratipad, Daqing, 1946: Saturday 26 October.

    confidence: boundary (tie-break-unstated)

Say it like this

In Daqing, Dyūta Pratipad 1946 falls on Saturday 26 October. Pratipadā runs from 07:32 on Fri 25 Oct to 09:09 on Sat 26 Oct and covers 177 of 208 minutes of pūrvāhṇa that forenoon. It also reaches the previous forenoon for 128 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/1946/dyuta-pratipad · pac-rp@2026.1

Who says what

AuthorityKindDate
Ahargaṇa, pac-rpThis rulingSat 26 Oct
Ahargaṇa, classicalDisc centre, no refractionSat 26 Oct
compat-drikpanchangComparison profileSat 26 Oct
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 24thCoveredSunrise 26thCoveredRuled
Los Angeles15:32 → 17:0906:050 min06:070 min25 Oct
Chicago17:32 → 19:0906:130 min06:150 min25 Oct
Jersey City18:32 → 20:0906:170 min06:190 min25 Oct
Port of Spain19:32 → 21:0905:560 min05:560 min25 Oct
London23:32 → 01:0906:390 min06:430 min25 Oct
Durban01:32 → 03:0905:100 min05:080 min25 Oct
Dubai03:32 → 05:0906:210 min06:230 min25 Oct
Delhi05:02 → 06:3906:270 min06:2911 min25 Oct
Kolkata05:02 → 06:3905:370 min05:3862 min25 Oct
Singapore07:02 → 08:3906:170 min06:17143 min25 Oct
Sydney09:32 → 11:0905:050 min05:02265 min26 Oct
Suva11:32 → 13:0905:320 min05:31253 min26 Oct
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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