Ruling · Vijayā Daśamī (Dussehra) · 1998

Thursday 1 October

Boundaryin Daqing, under the Rashtriya Panchang method. A threshold is only 4 min 54 s away. 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 1 October

Taken. The only day Daśamī with Śravaṇa reaches.

05:38 sunrisesunset 17:21
Śravaṇa begins 09:49:24Daśamī ends 17:15:58
05:1407:1409:1411:1413:1415:1417:1419:14

447 of 703 minutes covered, the first 447

Day of Friday 2 October

Daśamī with Śravaṇa is absent from the day time. Not taken.

05:39 sunrisesunset 17:19
05:1507:1509:1511:1513:1515:1517:1519:15

0 of 700 minutes covered

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 17:49 on Wed 30 Sep to 17:16 on Thu 1 Oct, and Śravaṇa from 09:49 on Thu 1 Oct to 09:24 on Fri 2 Oct. They are together from 09:49 on Thu 1 Oct to 17:16 on Thu 1 Oct.

    1998-10-01T01:49:24Z → 1998-10-01T09:15:59Z

  2. 02

    Kāla

    The day time is sunrise to sunset: 05:38–17:21 on the 1st, 05:39–17:19 on the 2nd.

    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 447 of 703 minutes on the 1st and 0 of 700 on the 2nd.

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

  4. 04

    Tie-break

    Only one day qualifies. No tie-break is needed.

    priority: unstated → only-day · margin 294 s < 300 s

  5. 05

    Ruling

    Vijayā Daśamī, Daqing, 1998: Thursday 1 October.

    confidence: boundary (margin)

Say it like this

In Daqing, Vijayā Daśamī (Dussehra) 1998 falls on Thursday 1 October. Daśamī runs from 17:49 on Wed 30 Sep to 17:16 on Thu 1 Oct and is with Śravaṇa in the day time that day, for 447 minutes. It is 4 min 54 s from a threshold: treat the date as contested.

ahargana.org/daqing/festivals/1998/vijaya-dashami · pac-rp@2026.1

Who says what

AuthorityKindDate
Ahargaṇa, pac-rpThis rulingThu 1 Oct
Ahargaṇa, classicalDisc centre, no refractionThu 1 Oct
compat-drikpanchangComparison profileThu 1 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 1stCoveredSunrise 2ndCoveredRuled
Los Angeles18:49 → 02:1606:480 min06:480 min30 Sep
Chicago20:49 → 04:1606:480 min06:490 min30 Sep
Jersey City21:49 → 05:1606:530 min06:540 min30 Sep
Port of Spain21:49 → 05:1605:550 min05:550 min30 Sep
London02:49 → 10:1607:01195 min07:030 min1 Oct
Durban03:49 → 11:1605:35341 min05:340 min1 Oct
Dubai05:49 → 13:1606:11425 min06:110 min1 Oct
Delhi07:19 → 14:4606:14447 min06:150 min1 Oct
Kolkata07:19 → 14:4605:28447 min05:280 min1 Oct
Singapore09:49 → 17:1606:52447 min06:510 min1 Oct
Sydney11:49 → 19:1605:33368 min05:320 min1 Oct
Suva13:49 → 21:1605:49254 min05:480 min1 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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