Ruling · Vasantotsava · 1918

Thursday 28 March

Determinatein Daqing, under the Rashtriya Panchang method. Clear of every threshold by 215 minutes.

Decide it for

46°35′ N 125°00′ E · Asia/Shanghai · GeoNames 2037860

The two sunrises

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

Sunrise of Thursday 28 March

Taken. The only sunrise Pratipadā holds at.

05:30 sunrise
04:1804:4205:0605:3005:5406:1806:42

Holds at sunrise

Sunrise of Friday 29 March

Pratipadā does not hold at sunrise. Not taken.

05:28 sunrise
04:1604:4005:0405:2805:5206:1606:40

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 23:32 on Wed 27 Mar to 01:54 on Fri 29 Mar.

    1918-03-27T15:32:25Z → 1918-03-28T17:53:39Z

  2. 02

    Kāla

    Sunrise is at 05:30 on the 28th and 05:28 on the 29th.

    sunrise: upper limb, 31′ + 16′

  3. 03

    Rule

    Pratipadā must be current at sunrise. It is on the 28th and is not on the 29th.

    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 12875 s

  5. 05

    Ruling

    Vasantotsava, Daqing, 1918: Thursday 28 March.

    confidence: determinate

Say it like this

In Daqing, Vasantotsava 1918 falls on Thursday 28 March. Pratipadā runs from 23:32 on Wed 27 Mar to 01:54 on Fri 29 Mar and is current at sunrise that day.

ahargana.org/daqing/festivals/1918/vasantotsava · pac-rp@2026.1

Who says what

AuthorityKindDate
Ahargaṇa, pac-rpThis rulingThu 28 Mar
Ahargaṇa, classicalDisc centre, no refractionThu 28 Mar
compat-drikpanchangComparison profileThu 28 Mar
No institution has a recorded ruling for Daqing.

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 27thCoveredSunrise 28thCoveredRuled
Los Angeles07:32 → 09:5405:48no05:47holds28 Mar
Chicago09:32 → 11:5405:43no05:42holds28 Mar
Jersey City10:32 → 12:5405:50no05:48holds28 Mar
Port of Spain11:32 → 13:5406:07no06:06holds28 Mar
London16:32 → 18:5406:50no06:47holds28 Mar
Durban17:32 → 19:5406:03no06:04holds28 Mar
Dubai19:13 → 21:3505:58no05:57holds28 Mar
Delhi21:02 → 23:2406:18no06:17holds28 Mar
Kolkata21:02 → 23:2405:35no05:34holds28 Mar
Singapore22:32 → 00:5406:07no06:07holds28 Mar
Sydney01:32 → 03:5406:03no06:04holds28 Mar
Suva03:32 → 05:5406:12no06:12holds28 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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