Ruling · Naraka Caturdaśī (Choti Diwali) · 1901

Sunday 10 November

Determinatein Baoding, under the Rashtriya Panchang method. Clear of every threshold by 204 minutes.

Decide it for

38°52′ N 115°28′ E · Asia/Shanghai · GeoNames 1816971

The two dawns

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

Dawn of Saturday 9 November

Caturdaśī is absent from aruṇodaya. Not taken.

05:04 aruṇodaya beginssunrise 06:53
04:4005:0405:2805:5206:1606:4007:04

0 of 110 minutes covered

Dawn of Sunday 10 November

Taken. The only dawn Caturdaśī reaches.

05:05 aruṇodaya beginssunrise 06:54
04:4105:0505:2905:5306:1706:4107:05

110 of 110 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 10:17 on Sat 9 Nov to 12:52 on Sun 10 Nov.

    1901-11-09T02:17:13Z → 1901-11-10T04:52:00Z

  2. 02

    Kāla

    Aruṇodaya is 2 muhūrtas before sunrise: 05:04–06:53 on the 9th, 05:05–06:54 on the 10th.

    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 110 minutes on the 9th and 110 of 110 on the 10th.

    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 12237 s

  5. 05

    Ruling

    Naraka Caturdaśī, Baoding, 1901: Sunday 10 November.

    confidence: determinate

Say it like this

In Baoding, Naraka Caturdaśī (Choti Diwali) 1901 falls on Sunday 10 November. Caturdaśī runs from 10:17 on Sat 9 Nov to 12:52 on Sun 10 Nov and covers all of aruṇodaya that dawn.

ahargana.org/baoding/festivals/1901/naraka-chaturdashi · pac-rp@2026.1

Who says what

AuthorityKindDate
Ahargaṇa, pac-rpThis rulingSun 10 Nov
Ahargaṇa, classicalDisc centre, no refractionSun 10 Nov
compat-drikpanchangComparison profileSun 10 Nov
No institution has a recorded ruling for Baoding.

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 9thCoveredAruṇodaya 10thCoveredRuled
Los Angeles18:17 → 20:5204:32107 min04:330 min9 Nov
Chicago20:17 → 22:5204:41111 min04:420 min9 Nov
Jersey City21:17 → 23:5204:45111 min04:460 min9 Nov
Port of Spain22:17 → 00:5204:2199 min04:210 min9 Nov
London02:17 → 04:5205:09118 min05:110 min9 Nov
Durban03:47 → 06:2203:0239 min03:0184 min9 Nov
Dubai05:58 → 08:3304:2914 min04:29104 min9 Nov
Delhi07:38 → 10:1304:450 min04:45105 min10 Nov
Kolkata07:38 → 10:1303:540 min03:54103 min10 Nov
Singapore09:12 → 11:4704:060 min04:0696 min10 Nov
Sydney12:17 → 14:5203:260 min03:2682 min10 Nov
Suva14:12 → 16:4703:500 min03:5089 min10 Nov
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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