Ruling · Vasantotsava · 1981

Saturday 21 March

Determinatein Phoenix, under the Rashtriya Panchang method. Clear of every threshold by 110 minutes.

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 Friday 20 March

Pratipadā does not hold at sunrise. Not taken.

06:32 sunrise
05:2005:4406:0806:3206:5607:2007:44

Absent at sunrise

Sunrise of Saturday 21 March

Taken. The only sunrise Pratipadā holds at.

06:31 sunrise
05:1905:4306:0706:3106:5507:1907:43

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 08:22 on Fri 20 Mar to 10:13 on Sat 21 Mar.

    1981-03-20T15:22:28Z → 1981-03-21T17:13:27Z

  2. 02

    Kāla

    Sunrise is at 06:32 on the 20th and 06:31 on the 21st.

    sunrise: upper limb, 31′ + 16′

  3. 03

    Rule

    Pratipadā must be current at sunrise. It is not on the 20th and is on the 21st.

    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 6616 s

  5. 05

    Ruling

    Vasantotsava, Phoenix, 1981: Saturday 21 March.

    confidence: determinate

Say it like this

In Phoenix, Vasantotsava 1981 falls on Saturday 21 March. Pratipadā runs from 08:22 on Fri 20 Mar to 10:13 on Sat 21 Mar and is current at sunrise that day.

ahargana.org/phoenix/festivals/1981/vasantotsava · pac-rp@2026.1

Who says what

AuthorityKindDate
Ahargaṇa, pac-rpThis rulingSat 21 Mar
Ahargaṇa, classicalDisc centre, no refractionSat 21 Mar
compat-drikpanchangComparison profileSat 21 Mar
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 20thCoveredSunrise 21stCoveredRuled
Los Angeles07:22 → 09:1305:57no05:55holds21 Mar
Chicago09:22 → 11:1305:54no05:53holds21 Mar
Jersey City10:22 → 12:1306:00no05:58holds21 Mar
Port of Spain11:22 → 13:1306:11no06:10holds21 Mar
London15:22 → 17:1306:04no06:02holds21 Mar
Durban17:22 → 19:1305:59no06:00holds21 Mar
Dubai19:22 → 21:1306:23no06:22holds21 Mar
Delhi20:52 → 22:4306:26no06:25holds21 Mar
Kolkata20:52 → 22:4305:41no05:40holds21 Mar
Singapore22:52 → 00:4306:39no06:39holds21 Mar
Sydney01:22 → 03:1305:58no05:59holds21 Mar
Suva03:22 → 05:1306:10no06:10holds21 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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