Ruling · Vasantotsava · 1938

Wednesday 16 March

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

Decide it for

8°50′ S 13°14′ E · Africa/Luanda · GeoNames 2240449

The two sunrises

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

Sunrise of Wednesday 16 March

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

06:12 sunrise
Pratipadā begins 06:15:05
05:0005:2405:4806:1206:3607:0007:24

Absent at sunrise

Sunrise of Thursday 17 March

Pratipadā does not hold at sunrise. Not taken.

06:12 sunrise
Pratipadā ends 05:17:11
05:0005:2405:4806:1206:3607:0007:24

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 06:15 on Wed 16 Mar to 05:17 on Thu 17 Mar.

    1938-03-16T05:15:06Z → 1938-03-17T04:17:11Z

  2. 02

    Kāla

    Sunrise is at 06:12 on the 16th and 06:12 on the 17th.

    sunrise: upper limb, 31′ + 16′

  3. 03

    Rule

    Pratipadā must be current at sunrise. It is not on the 16th and is not on the 17th.

    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 208 s < 300 s

  5. 05

    Ruling

    Vasantotsava, Luanda, 1938: Wednesday 16 March.

    confidence: boundary (margin, absent-unstated)

Say it like this

In Luanda, Vasantotsava 1938 falls on Wednesday 16 March. Pratipadā runs from 06:15 on Wed 16 Mar to 05:17 on Thu 17 Mar, and is current at sunrise on neither day. It is 3 min 28 s from a threshold: treat the date as contested.

ahargana.org/luanda/festivals/1938/vasantotsava · pac-rp@2026.1

Who says what

AuthorityKindDate
Ahargaṇa, pac-rpThis rulingWed 16 Mar
Ahargaṇa, classicalDisc centre, no refractionWed 16 Mar
compat-drikpanchangComparison profileWed 16 Mar
No institution has a recorded ruling for Luanda.

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 16thCoveredSunrise 17thCoveredRuled
Los Angeles21:15 → 20:1706:03holds06:02no16 Mar
Chicago23:15 → 22:1706:02holds06:00no16 Mar
Jersey City00:15 → 23:1706:08holds06:06no16 Mar
Port of Spain01:15 → 00:1706:13holds06:13no16 Mar
London05:15 → 04:1706:14holds06:12no16 Mar
Durban07:15 → 06:1705:57no05:57holds17 Mar
Dubai09:15 → 08:1706:28no06:27holds17 Mar
Delhi10:45 → 09:4706:31no06:30holds17 Mar
Kolkata10:45 → 09:4705:46no05:45holds17 Mar
Singapore12:35 → 11:3706:31no06:30holds17 Mar
Sydney15:15 → 14:1705:55no05:55holds17 Mar
Suva17:15 → 16:1706:09no06:09holds17 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

About Ahargaṇa