Ruling · Vasantotsava · 1990

Monday 12 March

Determinatein Riyadh, under the Rashtriya Panchang method. Clear of every threshold by 472 minutes.

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 Sunday 11 March

Pratipadā does not hold at sunrise. Not taken.

06:07 sunrise
04:5505:1905:4306:0706:3106:5507:19

Absent at sunrise

Sunrise of Monday 12 March

Taken. The only sunrise Pratipadā holds at.

06:06 sunrise
04:5405:1805:4206:0606:3006:5407:18

Holds 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 13:58 on Sun 11 Mar to 15:17 on Mon 12 Mar.

    1990-03-11T10:58:30Z → 1990-03-12T12:16:54Z

  2. 02

    Kāla

    Sunrise is at 06:07 on the 11th and 06:06 on the 12th.

    sunrise: upper limb, 31′ + 16′

  3. 03

    Rule

    Pratipadā must be current at sunrise. It is not on the 11th and is on the 12th.

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

  4. 04

    Tie-break

    Only one sunrise qualifies. No tie-break is needed.

    priority: purvaviddha → only-day · margin 28294 s

  5. 05

    Ruling

    Vasantotsava, Riyadh, 1990: Monday 12 March.

    confidence: determinate

Say it like this

In Riyadh, Vasantotsava 1990 falls on Monday 12 March. Pratipadā runs from 13:58 on Sun 11 Mar to 15:17 on Mon 12 Mar and is current at sunrise that day.

ahargana.org/riyadh/festivals/1990/vasantotsava · pac-rp@2026.1

Who says what

AuthorityKindDate
Ahargaṇa, pac-rpThis rulingMon 12 Mar
Ahargaṇa, classicalDisc centre, no refractionMon 12 Mar
compat-drikpanchangComparison profileMon 12 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 11thCoveredSunrise 12thCoveredRuled
Los Angeles02:58 → 04:1706:09holds06:08no11 Mar
Chicago04:58 → 06:1706:10holds06:08holds11 Mar
Jersey City05:58 → 07:1706:15holds06:13holds11 Mar
Port of Spain06:58 → 08:1706:16no06:15holds12 Mar
London10:58 → 12:1706:25no06:23holds12 Mar
Durban12:58 → 14:1705:54no05:54holds12 Mar
Dubai14:58 → 16:1706:33no06:32holds12 Mar
Delhi16:28 → 17:4706:36no06:35holds12 Mar
Kolkata16:28 → 17:4705:50no05:49holds12 Mar
Singapore18:58 → 20:1707:12no07:12holds12 Mar
Sydney20:58 → 22:1705:51no05:52holds12 Mar
Suva22:58 → 00:1706:08no06:08holds12 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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