Ruling · Vijayā Daśamī (Daśaharā) · 1981

Thursday 8 October

Boundaryin Daqing, under the Rashtriya Panchang method. Both days qualify and the rule does not say which to take. Say “contested”.

Decide it for

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

The two days

A tick is five ghaṭīs, two hours. The day time is sunrise to sunset.

Day of Thursday 8 October

Taken. Both days qualify; the rule is silent, and this one is covered longer.

05:47 sunrisesunset 17:07
Śravaṇa begins 07:53:45
05:2307:2309:2311:2313:2315:2317:23

553 of 680 minutes covered, the last 553

Day of Friday 9 October

Qualifies with 30 of 676 minutes. Not taken.

05:49 sunrisesunset 17:05
Daśamī ends 06:18:34
05:2507:2509:2511:2513:2515:2517:25

30 of 676 minutes covered, the first 30

Daśamī and Śravaṇa togetherThe day time, the window the rule readsThe instant they come together or part

How it was decided

  1. 01

    Aṅga

    Daśamī runs from 05:52 on Thu 8 Oct to 06:19 on Fri 9 Oct, and Śravaṇa from 07:54 on Thu 8 Oct to 08:53 on Fri 9 Oct. They are together from 07:54 on Thu 8 Oct to 06:19 on Fri 9 Oct.

    1981-10-07T23:53:45Z → 1981-10-08T22:18:34Z

  2. 02

    Kāla

    The day time is sunrise to sunset: 05:47–17:07 on the 8th, 05:49–17:05 on the 9th.

    daytime: sunrise-to-sunset · sunrise and sunset: upper limb, 31′ + 16′

  3. 03

    Rule

    Where Daśamī touches Śravaṇa in the day time, that day is taken. Together they cover 553 of 680 minutes on the 8th and 30 of 676 on the 9th.

    Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 104

  4. 04

    Tie-break

    Both days qualify and the rule marks neither. The one covered longer is ruled, as a boundary.

    priority: unstated → greater-coverage · margin 1785 s

  5. 05

    Ruling

    Vijayā Daśamī, Daqing, 1981: Thursday 8 October.

    confidence: boundary (tie-break-unstated)

Say it like this

In Daqing, Vijayā Daśamī (Dussehra) 1981 falls on Thursday 8 October. Daśamī runs from 05:52 on Thu 8 Oct to 06:19 on Fri 9 Oct and is with Śravaṇa in the day time that day, for 553 minutes. They are together in the day time on the next day too, for 30 minutes; the rule does not say which to take, and the day they share longer is ruled: treat the date as contested.

ahargana.org/daqing/festivals/1981/vijaya-dashami · pac-rp@2026.1

Who says what

AuthorityKindDate
Ahargaṇa, pac-rpThis rulingThu 8 Oct
Ahargaṇa, classicalDisc centre, no refractionThu 8 Oct
compat-drikpanchangComparison profileThu 8 Oct
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/vijaya-dashami · ruleset 2026.3-draft

Month
Āśvina, amānta
Pakṣa · aṅga
Śukla · Daśamī
Kāla
Madhyāhna
Priority
Unstated
Tie-break
Longer coverage, as a boundary
First
With Śravaṇa in the day time

“S 10 Vijaya dasami (In Bengal it is observed as paraviddha, covering one muhurta from sunrise. In other places, if it touches Sravana naksatra in the day time it is observed on that day), Sarasvati visarjana (to be observed in naksatra Sravana), Dasahara.” Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 104. The Bengal reading (paraviddha, one muhūrta from sunrise) is not applied.

The same rule, elsewhere

Twelve places, west to east. Local clock times.

PlaceDaśamī with ŚravaṇaSunrise 7thCoveredSunrise 8thCoveredRuled
Los Angeles16:54 → 15:1906:5295 min06:53506 min8 Oct
Chicago18:54 → 17:1906:540 min06:55623 min8 Oct
Jersey City19:54 → 18:1906:590 min07:00678 min8 Oct
Port of Spain19:54 → 18:1905:550 min05:55717 min8 Oct
London00:54 → 23:1907:110 min07:13670 min8 Oct
Durban01:54 → 00:1905:280 min05:26754 min8 Oct
Dubai03:54 → 02:1906:130 min06:14705 min8 Oct
Delhi05:24 → 03:4906:170 min06:18701 min8 Oct
Kolkata05:24 → 03:4905:300 min05:30707 min8 Oct
Singapore07:24 → 05:4906:200 min06:20661 min8 Oct
Sydney09:54 → 08:1905:250 min05:24489 min8 Oct
Suva11:54 → 10:1905:440 min05:43371 min8 Oct
Profile · tradition
pac-rp@2026.1 · smarta
Rule
vijaya-dashami@2026.3-draft
Engine · kernel
0.1.0 · de440 7eef…ea74
Boundary margin
300 s

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