Ruling · Vasantotsava · 1985

Thursday 7 March

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

Decide it for

22°20′ N 91°50′ E · Asia/Dhaka · GeoNames 1205733

The two sunrises

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

Sunrise of Thursday 7 March

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

06:09 sunrise
04:5705:2105:4506:0906:3306:5707:21

Absent at sunrise

Sunrise of Friday 8 March

Pratipadā does not hold at sunrise. Not taken.

06:08 sunrise
04:5605:2005:4406:0806:3206:5607:20

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 08:13 on Thu 7 Mar to 04:41 on Fri 8 Mar.

    1985-03-07T02:13:07Z → 1985-03-07T22:41:28Z

  2. 02

    Kāla

    Sunrise is at 06:09 on the 7th and 06:08 on the 8th.

    sunrise: upper limb, 31′ + 16′

  3. 03

    Rule

    Pratipadā must be current at sunrise. It is not on the 7th and is not on the 8th.

    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 5220 s

  5. 05

    Ruling

    Vasantotsava, Chattogram, 1985: Thursday 7 March.

    confidence: boundary (absent-unstated)

Say it like this

In Chattogram, Vasantotsava 1985 falls on Thursday 7 March. Pratipadā runs from 08:13 on Thu 7 Mar to 04:41 on Fri 8 Mar, and is current at sunrise on neither day.

ahargana.org/chattogram/festivals/1985/vasantotsava · pac-rp@2026.1

Who says what

AuthorityKindDate
Ahargaṇa, pac-rpThis rulingThu 7 Mar
Ahargaṇa, classicalDisc centre, no refractionThu 7 Mar
compat-drikpanchangComparison profileThu 7 Mar
No institution has a recorded ruling for Chattogram.

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 7thCoveredSunrise 8thCoveredRuled
Los Angeles18:13 → 14:4106:14holds06:13no7 Mar
Chicago20:13 → 16:4106:16holds06:14no7 Mar
Jersey City21:13 → 17:4106:21holds06:20no7 Mar
Port of Spain22:13 → 18:4106:18holds06:17no7 Mar
London02:13 → 22:4106:33holds06:31no7 Mar
Durban04:13 → 00:4105:51holds05:52no7 Mar
Dubai06:13 → 02:4106:36holds06:36no7 Mar
Delhi07:43 → 04:1106:40no06:39no7 Mar
Kolkata07:43 → 04:1105:53no05:52no7 Mar
Singapore10:13 → 06:4107:13no07:13no7 Mar
Sydney12:13 → 08:4105:48no05:49holds8 Mar
Suva14:13 → 10:4106:07no06:07holds8 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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