Ruling · Naraka Caturdaśī (Choti Diwali) · 1908

Saturday 24 October

Determinatein Daqing, under the Rashtriya Panchang method. Clear of every threshold by 369 minutes.

Decide it for

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

The two dawns

One ghaṭī is 24 minutes. Aruṇodaya is 2 muhūrtas before sunrise.

Dawn of Friday 23 October

Caturdaśī is absent from aruṇodaya. Not taken.

04:20 aruṇodaya beginssunrise 06:08
03:5604:2004:4405:0805:3205:5606:20

0 of 107 minutes covered

Dawn of Saturday 24 October

Taken. The only dawn Caturdaśī reaches.

04:21 aruṇodaya beginssunrise 06:09
03:5704:2104:4505:0905:3305:5706:21

108 of 108 minutes covered

Caturdaśī presentAruṇodaya, the window the rule readsThe instant the tithi begins or ends

How it was decided

  1. 01

    Aṅga

    Caturdaśī runs from 12:17 on Fri 23 Oct to 13:45 on Sat 24 Oct.

    1908-10-23T04:17:05Z → 1908-10-24T05:44:55Z

  2. 02

    Kāla

    Aruṇodaya is 2 muhūrtas before sunrise: 04:20–06:08 on the 23rd, 04:21–06:09 on the 24th.

    arunodaya: prev-night-muhurta-14-15 · sunrise and sunset: upper limb, 31′ + 16′

  3. 03

    Rule

    Caturdaśī must be present during aruṇodaya. It covers 0 of 107 minutes on the 23rd and 108 of 108 on the 24th.

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

  4. 04

    Tie-break

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

    priority: purvaviddha → only-day · margin 22149 s

  5. 05

    Ruling

    Naraka Caturdaśī, Daqing, 1908: Saturday 24 October.

    confidence: determinate

Say it like this

In Daqing, Naraka Caturdaśī (Choti Diwali) 1908 falls on Saturday 24 October. Caturdaśī runs from 12:17 on Fri 23 Oct to 13:45 on Sat 24 Oct and covers all of aruṇodaya that dawn.

ahargana.org/daqing/festivals/1908/naraka-chaturdashi · pac-rp@2026.1

Who says what

AuthorityKindDate
Ahargaṇa, pac-rpThis rulingSat 24 Oct
Ahargaṇa, classicalDisc centre, no refractionSat 24 Oct
compat-drikpanchangComparison profileSat 24 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/naraka-chaturdashi · ruleset 2026.3-draft

Month
Āśvina, amānta
Pakṣa · aṅga
Kṛṣṇa · Caturdaśī
Kāla
Aruṇodaya
Priority
Pūrvaviddhā
Tie-break
First day
Reference
CRC 1955, p. 104

“K 14 Naraka caturdasi (covering a period of 4 ghatikas before 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. 104.

The same rule, elsewhere

Twelve places, west to east. Local clock times.

PlaceCaturdaśīAruṇodaya 23rdCoveredAruṇodaya 24thCoveredRuled
Los Angeles20:17 → 21:4504:22103 min04:220 min23 Oct
Chicago22:17 → 23:4504:26106 min04:270 min23 Oct
Jersey City23:17 → 00:4504:31105 min04:320 min23 Oct
Port of Spain00:17 → 01:4504:1997 min04:190 min23 Oct
London04:17 → 05:4504:48110 min04:4956 min23 Oct
Durban06:17 → 07:4503:420 min03:4288 min24 Oct
Dubai07:58 → 09:2604:210 min04:22101 min24 Oct
Delhi09:47 → 11:1504:450 min04:46102 min24 Oct
Kolkata09:47 → 11:1503:560 min03:57100 min24 Oct
Singapore11:17 → 12:4504:120 min04:1195 min24 Oct
Sydney14:17 → 15:4503:390 min03:3887 min24 Oct
Suva16:12 → 17:4003:570 min03:5691 min24 Oct
Profile · tradition
pac-rp@2026.1 · smarta
Rule
naraka-chaturdashi@2026.3-draft
Engine · kernel
0.1.0 · de440 7eef…ea74
Boundary margin
300 s

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