Ruling · Vasantotsava · 1997

Tuesday 25 March

Determinatein Tehran, under the Rashtriya Panchang method. Clear of every threshold by 132 minutes.

Decide it for

35°42′ N 51°25′ E · Asia/Tehran · GeoNames 112931

The two sunrises

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

Sunrise of Monday 24 March

Pratipadā does not hold at sunrise. Not taken.

07:03 sunrise
05:5106:1506:3907:0307:2707:5108:15

Absent at sunrise

Sunrise of Tuesday 25 March

Taken. The only sunrise Pratipadā holds at.

07:01 sunrise
05:4906:1306:3707:0107:2507:4908:13

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 09:15 on Mon 24 Mar to 11:09 on Tue 25 Mar.

    1997-03-24T04:45:14Z → 1997-03-25T06:38:41Z

  2. 02

    Kāla

    Sunrise is at 07:03 on the 24th and 07:01 on the 25th.

    sunrise: upper limb, 31′ + 16′

  3. 03

    Rule

    Pratipadā must be current at sunrise. It is not on the 24th and is on the 25th.

    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 7942 s

  5. 05

    Ruling

    Vasantotsava, Tehran, 1997: Tuesday 25 March.

    confidence: determinate

Say it like this

In Tehran, Vasantotsava 1997 falls on Tuesday 25 March. Pratipadā runs from 09:15 on Mon 24 Mar to 11:09 on Tue 25 Mar and is current at sunrise that day.

ahargana.org/tehran/festivals/1997/vasantotsava · pac-rp@2026.1

Who says what

AuthorityKindDate
Ahargaṇa, pac-rpThis rulingTue 25 Mar
Ahargaṇa, classicalDisc centre, no refractionTue 25 Mar
compat-drikpanchangComparison profileTue 25 Mar
No institution has a recorded ruling for Tehran.

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 24thCoveredSunrise 25thCoveredRuled
Los Angeles20:45 → 22:3905:51holds05:50no24 Mar
Chicago22:45 → 00:3905:47holds05:45no24 Mar
Jersey City23:45 → 01:3905:53holds05:52no24 Mar
Port of Spain00:45 → 02:3906:08holds06:07no24 Mar
London04:45 → 06:3905:55holds05:52holds24 Mar
Durban06:45 → 08:3906:02no06:03holds25 Mar
Dubai08:45 → 10:3906:19no06:18holds25 Mar
Delhi10:15 → 12:0906:21no06:20holds25 Mar
Kolkata10:15 → 12:0905:37no05:36holds25 Mar
Singapore12:45 → 14:3907:08no07:07holds25 Mar
Sydney15:45 → 17:3907:01no07:02holds25 Mar
Suva16:45 → 18:3906:11no06:11holds25 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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