Ruling · Naraka Caturdaśī (Choti Diwali) · 2021

Thursday 4 November

Determinatein Baoding, under the Rashtriya Panchang method. Clear of every threshold by 105 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 Wednesday 3 November

Caturdaśī is absent from aruṇodaya. Not taken.

04:59 aruṇodaya beginssunrise 06:47
04:3504:5905:2305:4706:1106:3506:59

0 of 108 minutes covered

Dawn of Thursday 4 November

Taken. The only dawn Caturdaśī reaches.

05:00 aruṇodaya beginssunrise 06:49
04:3605:0005:2405:4806:1206:3607:00

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 11:32 on Wed 3 Nov to 08:34 on Thu 4 Nov.

    2021-11-03T03:32:28Z → 2021-11-04T00:33:42Z

  2. 02

    Kāla

    Aruṇodaya is 2 muhūrtas before sunrise: 04:59–06:47 on the 3rd, 05:00–06:49 on the 4th.

    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 108 minutes on the 3rd and 108 of 108 on the 4th.

    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 6306 s

  5. 05

    Ruling

    Naraka Caturdaśī, Baoding, 2021: Thursday 4 November.

    confidence: determinate

Say it like this

In Baoding, Naraka Caturdaśī (Choti Diwali) 2021 falls on Thursday 4 November. Caturdaśī runs from 11:32 on Wed 3 Nov to 08:34 on Thu 4 Nov and covers all of aruṇodaya that dawn.

ahargana.org/baoding/festivals/2021/naraka-chaturdashi · pac-rp@2026.1

Who says what

AuthorityKindDate
Ahargaṇa, pac-rpThis rulingThu 4 Nov
Ahargaṇa, classicalDisc centre, no refractionThu 4 Nov
compat-drikpanchangComparison profileThu 4 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 3rdCoveredAruṇodaya 4thCoveredRuled
Los Angeles20:32 → 17:3405:29106 min05:290 min3 Nov
Chicago22:32 → 19:3405:36110 min05:370 min3 Nov
Jersey City23:32 → 20:3405:40109 min05:410 min3 Nov
Port of Spain23:32 → 20:3404:2098 min04:200 min3 Nov
London03:32 → 00:3405:03116 min05:040 min3 Nov
Durban05:32 → 02:3403:340 min03:340 min3 Nov
Dubai07:32 → 04:3404:450 min04:450 min3 Nov
Delhi09:02 → 06:0404:510 min04:5172 min4 Nov
Kolkata09:02 → 06:0404:000 min04:01102 min4 Nov
Singapore11:32 → 08:3405:110 min05:1196 min4 Nov
Sydney14:32 → 11:3404:290 min04:2984 min4 Nov
Suva15:32 → 12:3403:570 min03:5690 min4 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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