Ruling · Vasantotsava · 2010

Sunday 28 February

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

Decide it for

33°27′ N 112°04′ W · America/Phoenix · GeoNames 5308655

The two sunrises

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

Sunrise of Sunday 28 February

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

06:58 sunrise
05:4606:1006:3406:5807:2207:4608:10

Absent at sunrise

Sunrise of Monday 1 March

Pratipadā does not hold at sunrise. Not taken.

06:57 sunrise
Pratipadā ends 06:02:00
05:4506:0906:3306:5707:2107:4508:09

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 09:38 on Sun 28 Feb to 06:02 on Mon 1 Mar.

    2010-02-28T16:37:52Z → 2010-03-01T13:02:01Z

  2. 02

    Kāla

    Sunrise is at 06:58 on the 28th and 06:57 on the 1st.

    sunrise: upper limb, 31′ + 16′

  3. 03

    Rule

    Pratipadā must be current at sunrise. It is not on the 28th and is not on the 1st.

    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 3285 s

  5. 05

    Ruling

    Vasantotsava, Phoenix, 2010: Sunday 28 February.

    confidence: boundary (absent-unstated)

Say it like this

In Phoenix, Vasantotsava 2010 falls on Sunday 28 February. Pratipadā runs from 09:38 on Sun 28 Feb to 06:02 on Mon 1 Mar, and is current at sunrise on neither day.

ahargana.org/phoenix/festivals/2010/vasantotsava · pac-rp@2026.1

Who says what

AuthorityKindDate
Ahargaṇa, pac-rpThis rulingSun 28 Feb
Ahargaṇa, classicalDisc centre, no refractionSun 28 Feb
compat-drikpanchangComparison profileSun 28 Feb
No institution has a recorded ruling for Phoenix.

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 28thCoveredSunrise 1stCoveredRuled
Los Angeles08:38 → 05:0206:23no06:22no28 Feb
Chicago10:38 → 07:0206:27no06:26holds1 Mar
Jersey City11:38 → 08:0206:32no06:31holds1 Mar
Port of Spain12:38 → 09:0206:21no06:21holds1 Mar
London16:38 → 13:0206:49no06:46holds1 Mar
Durban18:38 → 15:0205:46no05:47holds1 Mar
Dubai20:38 → 17:0206:43no06:42holds1 Mar
Delhi22:08 → 18:3206:48no06:47holds1 Mar
Kolkata22:08 → 18:3205:59no05:58holds1 Mar
Singapore00:38 → 21:0207:15no07:15holds1 Mar
Sydney03:38 → 00:0206:42no06:43holds1 Mar
Suva05:38 → 02:0207:05no07:05holds1 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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