Ruling · Vasantotsava · 1963

Monday 11 March

Determinatein Cairo, under the Rashtriya Panchang method. Clear of every threshold by 216 minutes.

Decide it for

30°04′ N 31°15′ E · Africa/Cairo · GeoNames 360630

The two sunrises

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

Sunrise of Sunday 10 March

Pratipadā does not hold at sunrise. Not taken.

06:12 sunrise
05:0005:2405:4806:1206:3607:0007:24

Absent at sunrise

Sunrise of Monday 11 March

Taken. The only sunrise Pratipadā holds at.

06:11 sunrise
04:5905:2305:4706:1106:3506:5907:23

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 09:49 on Sun 10 Mar to 11:46 on Mon 11 Mar.

    1963-03-10T07:48:34Z → 1963-03-11T09:46:06Z

  2. 02

    Kāla

    Sunrise is at 06:12 on the 10th and 06:11 on the 11th.

    sunrise: upper limb, 31′ + 16′

  3. 03

    Rule

    Pratipadā must be current at sunrise. It is not on the 10th and is on the 11th.

    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 12983 s

  5. 05

    Ruling

    Vasantotsava, Cairo, 1963: Monday 11 March.

    confidence: determinate

Say it like this

In Cairo, Vasantotsava 1963 falls on Monday 11 March. Pratipadā runs from 09:49 on Sun 10 Mar to 11:46 on Mon 11 Mar and is current at sunrise that day.

ahargana.org/cairo/festivals/1963/vasantotsava · pac-rp@2026.1

Who says what

AuthorityKindDate
Ahargaṇa, pac-rpThis rulingMon 11 Mar
Ahargaṇa, classicalDisc centre, no refractionMon 11 Mar
compat-drikpanchangComparison profileMon 11 Mar
No institution has a recorded ruling for Cairo.

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 10thCoveredSunrise 11thCoveredRuled
Los Angeles23:49 → 01:4606:11holds06:10no10 Mar
Chicago01:49 → 03:4606:12holds06:11no10 Mar
Jersey City02:49 → 04:4606:17holds06:16no10 Mar
Port of Spain03:49 → 05:4606:17holds06:16no10 Mar
London07:49 → 09:4606:28no06:26holds11 Mar
Durban09:49 → 11:4605:53no05:53holds11 Mar
Dubai11:49 → 13:4606:34no06:33holds11 Mar
Delhi13:19 → 15:1606:38no06:37holds11 Mar
Kolkata13:19 → 15:1605:51no05:50holds11 Mar
Singapore15:19 → 17:1606:43no06:42holds11 Mar
Sydney17:49 → 19:4605:50no05:51holds11 Mar
Suva19:49 → 21:4606:08no06:08holds11 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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