Ruling · Naraka Caturdaśī (Choti Diwali) · 1923

Wednesday 7 November

Boundaryin Baoding, under the Rashtriya Panchang method. Caturdaśī reaches aruṇodaya on neither day and the rule does not say what then. Say “contested”.

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 Wednesday 7 November

Taken. Caturdaśī reaches neither dawn; this is the day it falls on.

05:02 aruṇodaya beginssunrise 06:51
Caturdaśī begins 07:00:11
04:3805:0205:2605:5006:1406:3807:02

0 of 109 minutes covered

Dawn of Thursday 8 November

Caturdaśī is absent from aruṇodaya. Not taken.

05:03 aruṇodaya beginssunrise 06:52
04:3905:0305:2705:5106:1506:3907:03

0 of 109 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 07:00 on Wed 7 Nov to 03:20 on Thu 8 Nov.

    1923-11-06T23:00:12Z → 1923-11-07T19:19:56Z

  2. 02

    Kāla

    Aruṇodaya is 2 muhūrtas before sunrise: 05:02–06:51 on the 7th, 05:03–06:52 on the 8th.

    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 109 minutes on the 7th and 0 of 109 on the 8th.

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

  4. 04

    Tie-break

    Neither dawn qualifies. The day the tithi falls on is taken.

    priority: purvaviddha → tithi-day · margin 573 s

  5. 05

    Ruling

    Naraka Caturdaśī, Baoding, 1923: Wednesday 7 November.

    confidence: boundary (absent-unstated)

Say it like this

In Baoding, Naraka Caturdaśī (Choti Diwali) 1923 falls on Wednesday 7 November. Caturdaśī runs from 07:00 on Wed 7 Nov to 03:20 on Thu 8 Nov, and reaches aruṇodaya on neither day.

ahargana.org/baoding/festivals/1923/naraka-chaturdashi · pac-rp@2026.1

Who says what

AuthorityKindDate
Ahargaṇa, pac-rpThis rulingWed 7 Nov
Ahargaṇa, classicalDisc centre, no refractionWed 7 Nov
compat-drikpanchangComparison profileWed 7 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 6thCoveredAruṇodaya 7thCoveredRuled
Los Angeles15:00 → 11:2004:300 min04:31107 min7 Nov
Chicago17:00 → 13:2004:380 min04:39111 min7 Nov
Jersey City18:00 → 14:2004:420 min04:43110 min7 Nov
Port of Spain19:00 → 15:2004:200 min04:2098 min7 Nov
London23:00 → 19:2005:050 min05:06117 min7 Nov
Durban01:00 → 21:2003:340 min03:3385 min7 Nov
Dubai03:00 → 23:2004:460 min04:46103 min7 Nov
Delhi04:30 → 00:5004:520 min04:52105 min7 Nov
Kolkata04:30 → 00:5004:010 min04:0274 min7 Nov
Singapore06:00 → 02:2004:110 min04:110 min7 Nov
Sydney09:00 → 05:2003:280 min03:280 min8 Nov
Suva11:00 → 07:2003:560 min03:560 min8 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

About Ahargaṇa