Ruling · Vasantotsava · 1947

Friday 7 March

Boundaryin Riyadh, under the Rashtriya Panchang method. Pratipadā reaches sunrise on neither day and the rule does not say what then. Say “contested”.

Decide it for

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

The two sunrises

One ghaṭī is 24 minutes. The sunrise is read as upper limb, 31′ + 16′.

Sunrise of Friday 7 March

Taken. Pratipadā reaches neither sunrise; this is the day it falls on.

06:17 sunrise
Pratipadā begins 06:21:56
05:0505:2905:5306:1706:4107:0507:29

Absent at sunrise

Sunrise of Saturday 8 March

Pratipadā does not hold at sunrise. Not taken.

06:16 sunrise
05:0405:2805:5206:1606:4007:0407:28

Absent at sunrise

Pratipadā presentSunrise, the instant the rule readsThe instant the tithi begins or ends

How it was decided

  1. 01

    Aṅga

    Pratipadā runs from 06:21 on Fri 7 Mar to 04:35 on Sat 8 Mar.

    1947-03-07T03:15:05Z → 1947-03-08T01:28:37Z

  2. 02

    Kāla

    Sunrise is at 06:17 on the 7th and 06:16 on the 8th.

    sunrise: upper limb, 31′ + 16′

  3. 03

    Rule

    Pratipadā must be current at sunrise. It is not on the 7th and is not on the 8th.

    Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 105

  4. 04

    Tie-break

    Neither sunrise qualifies. The day the tithi falls on is taken.

    priority: purvaviddha → tithi-day · margin 218 s < 300 s

  5. 05

    Ruling

    Vasantotsava, Riyadh, 1947: Friday 7 March.

    confidence: boundary (margin, absent-unstated)

Say it like this

In Riyadh, Vasantotsava 1947 falls on Friday 7 March. Pratipadā runs from 06:21 on Fri 7 Mar to 04:35 on Sat 8 Mar, and is current at sunrise on neither day. It is 3 min 38 s from a threshold: treat the date as contested.

ahargana.org/riyadh/festivals/1947/vasantotsava · pac-rp@2026.1

Who says what

AuthorityKindDate
Ahargaṇa, pac-rpThis rulingFri 7 Mar
Ahargaṇa, classicalDisc centre, no refractionFri 7 Mar
compat-drikpanchangComparison profileFri 7 Mar
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/vasantotsava · ruleset 2026.3-draft

Month
Phālguna, amānta
Pakṣa · aṅga
Kṛṣṇa · Pratipadā
Kāla
Sunrise
Priority
Pūrvaviddhā
Tie-break
First day
Reference
CRC 1955, p. 105

“K 1 Vasantotsava (current at sunrise, if occurs on two successive days, it is to be observed on the first day).” Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 105.

The same rule, elsewhere

Twelve places, west to east. Local clock times.

PlacePratipadāSunrise 7thCoveredSunrise 8thCoveredRuled
Los Angeles19:15 → 17:2906:15holds06:14no7 Mar
Chicago21:15 → 19:2906:17holds06:16no7 Mar
Jersey City22:15 → 20:2906:23holds06:21no7 Mar
Port of Spain23:15 → 21:2906:18holds06:18no7 Mar
London03:15 → 01:2906:35holds06:33no7 Mar
Durban05:15 → 03:2905:51holds05:51no7 Mar
Dubai07:15 → 05:2906:37no06:36no7 Mar
Delhi08:45 → 06:5906:41no06:40holds8 Mar
Kolkata08:45 → 06:5905:54no05:53holds8 Mar
Singapore10:45 → 08:5906:43no06:43holds8 Mar
Sydney13:15 → 11:2905:47no05:48holds8 Mar
Suva15:15 → 13:2906:07no06:07holds8 Mar
Profile · tradition
pac-rp@2026.1 · smarta
Rule
vasantotsava@2026.3-draft
Engine · kernel
0.1.0 · de440 7eef…ea74
Boundary margin
300 s

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