Ruling · Dyūta Pratipad · 1925

Sunday 18 October

Determinatein Daqing, under the Rashtriya Panchang method. Clear of every threshold by 235 minutes.

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 Sunday 18 October

Taken. The only forenoon Pratipadā reaches.

06:01 sunrisepūrvāhṇa ends 09:37
05:3706:2507:1308:0108:4909:37

216 of 216 minutes covered

Forenoon of Monday 19 October

Pratipadā is absent from pūrvāhṇa. Not taken.

06:02 sunrisepūrvāhṇa ends 09:37
05:3806:2607:1408:0208:5009:38

0 of 215 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 02:06 on Sun 18 Oct to 01:24 on Mon 19 Oct.

    1925-10-17T18:05:36Z → 1925-10-18T17:23:41Z

  2. 02

    Kāla

    Pūrvāhṇa is first 5 of 15 day muhūrtas: 06:01–09:37 on the 18th, 06:02–09:37 on the 19th.

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

  3. 03

    Rule

    Pratipadā must be present during pūrvāhṇa. It covers 216 of 216 minutes on the 18th and 0 of 215 on the 19th.

    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 14103 s

  5. 05

    Ruling

    Dyūta Pratipad, Daqing, 1925: Sunday 18 October.

    confidence: determinate

Say it like this

In Daqing, Dyūta Pratipad 1925 falls on Sunday 18 October. Pratipadā runs from 02:06 on Sun 18 Oct to 01:24 on Mon 19 Oct and covers all of pūrvāhṇa that forenoon.

ahargana.org/daqing/festivals/1925/dyuta-pratipad · pac-rp@2026.1

Who says what

AuthorityKindDate
Ahargaṇa, pac-rpThis rulingSun 18 Oct
Ahargaṇa, classicalDisc centre, no refractionSun 18 Oct
compat-drikpanchangComparison profileSun 18 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 17thCoveredSunrise 18thCoveredRuled
Los Angeles10:06 → 09:2406:000 min06:01203 min18 Oct
Chicago12:06 → 11:2406:050 min06:06220 min18 Oct
Jersey City13:06 → 12:2406:090 min06:11220 min18 Oct
Port of Spain14:06 → 13:2405:550 min05:55237 min18 Oct
London18:06 → 17:2406:270 min06:29211 min18 Oct
Durban20:06 → 19:2405:170 min05:16257 min18 Oct
Dubai22:06 → 21:2406:180 min06:18230 min18 Oct
Delhi23:36 → 22:5406:230 min06:23228 min18 Oct
Kolkata23:36 → 22:5405:340 min05:34232 min18 Oct
Singapore01:06 → 00:2405:480 min05:48242 min18 Oct
Sydney04:06 → 03:2405:130 min05:12259 min18 Oct
Suva06:06 → 05:2405:370 min05:36221 min18 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

About Ahargaṇa