Ruling · Dyūta Pratipad · 1921

Monday 31 October

Determinatein Riyadh, under the Rashtriya Panchang method. Clear of every threshold by 201 minutes.

Decide it for

24°41′ N 46°43′ E · Asia/Riyadh · GeoNames 108410

The two forenoons

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

Forenoon of Monday 31 October

Taken. The only forenoon Pratipadā reaches.

06:05 sunrisepūrvāhṇa ends 09:50
05:4106:2907:1708:0508:5309:41

225 of 225 minutes covered

Forenoon of Tuesday 1 November

Pratipadā is absent from pūrvāhṇa. Not taken.

06:06 sunrisepūrvāhṇa ends 09:50
05:4206:3007:1808:0608:5409:42

0 of 224 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 02:44 on Mon 31 Oct to 01:21 on Tue 1 Nov.

    1921-10-30T23:38:26Z → 1921-10-31T22:15:11Z

  2. 02

    Kāla

    Pūrvāhṇa is first 5 of 15 day muhūrtas: 06:05–09:50 on the 31st, 06:06–09:50 on the 1st.

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

  3. 03

    Rule

    Pratipadā must be present during pūrvāhṇa. It covers 225 of 225 minutes on the 31st and 0 of 224 on the 1st.

    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 12059 s

  5. 05

    Ruling

    Dyūta Pratipad, Riyadh, 1921: Monday 31 October.

    confidence: determinate

Say it like this

In Riyadh, Dyūta Pratipad 1921 falls on Monday 31 October. Pratipadā runs from 02:44 on Mon 31 Oct to 01:21 on Tue 1 Nov and covers all of pūrvāhṇa that forenoon.

ahargana.org/riyadh/festivals/1921/dyuta-pratipad · pac-rp@2026.1

Who says what

AuthorityKindDate
Ahargaṇa, pac-rpThis rulingMon 31 Oct
Ahargaṇa, classicalDisc centre, no refractionMon 31 Oct
compat-drikpanchangComparison profileMon 31 Oct
No institution has a recorded ruling for Riyadh.

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 30thCoveredSunrise 31stCoveredRuled
Los Angeles15:38 → 14:1506:110 min06:12216 min31 Oct
Chicago17:38 → 16:1506:200 min06:22208 min31 Oct
Jersey City18:38 → 17:1506:240 min06:25210 min31 Oct
Port of Spain19:38 → 18:1505:570 min05:57235 min31 Oct
London23:38 → 22:1506:500 min06:52195 min31 Oct
Durban01:38 → 00:1505:040 min05:03264 min31 Oct
Dubai03:38 → 02:1506:250 min06:26225 min31 Oct
Delhi05:08 → 03:4506:310 min06:32222 min31 Oct
Kolkata05:08 → 03:4505:400 min05:40227 min31 Oct
Singapore06:38 → 05:1505:460 min05:46189 min31 Oct
Sydney09:38 → 08:1504:580 min04:570 min1 Nov
Suva11:38 → 10:1505:290 min05:280 min1 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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