Ruling · Naraka Caturdaśī (Choti Diwali) · 1972

Saturday 4 November

Boundaryin Baoding, under the Rashtriya Panchang method. A threshold is only 2 min 34 s away. 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 Saturday 4 November

Taken. Both dawns qualify; the rule takes the first.

05:00 aruṇodaya beginssunrise 06:49
Caturdaśī begins 04:57:33
04:3605:0005:2405:4806:1206:3607:00

108 of 108 minutes covered

Dawn of Sunday 5 November

Qualifies with 109 of 109 minutes. Not taken.

05:01 aruṇodaya beginssunrise 06:50
04:3705:0105:2505:4906:1306:3707:01

109 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 04:58 on Sat 4 Nov to 07:02 on Sun 5 Nov.

    1972-11-03T20:57:34Z → 1972-11-04T23:02:04Z

  2. 02

    Kāla

    Aruṇodaya is 2 muhūrtas before sunrise: 05:00–06:49 on the 4th, 05:01–06:50 on the 5th.

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

  3. 03

    Rule

    Caturdaśī must be present during aruṇodaya. It covers 108 of 108 minutes on the 4th and 109 of 109 on the 5th.

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

  4. 04

    Tie-break

    Both dawns qualify. Pūrvaviddhā: the first is taken.

    priority: purvaviddha → purvaviddha · margin 154 s < 300 s

  5. 05

    Ruling

    Naraka Caturdaśī, Baoding, 1972: Saturday 4 November.

    confidence: boundary (margin)

Say it like this

In Baoding, Naraka Caturdaśī (Choti Diwali) 1972 falls on Saturday 4 November. Caturdaśī runs from 04:58 on Sat 4 Nov to 07:02 on Sun 5 Nov and covers all of aruṇodaya that dawn. It also reaches the next dawn for 109 minutes; by the rule the first dawn is taken. It is 2 min 34 s from a threshold: treat the date as contested.

ahargana.org/baoding/festivals/1972/naraka-chaturdashi · pac-rp@2026.1

Who says what

AuthorityKindDate
Ahargaṇa, pac-rpThis rulingSat 4 Nov
Ahargaṇa, classicalDisc centre, no refractionSat 4 Nov
compat-drikpanchangComparison profileSat 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 Angeles12:58 → 15:0204:290 min04:29106 min4 Nov
Chicago14:58 → 17:0204:360 min04:37110 min4 Nov
Jersey City15:58 → 18:0204:400 min04:41109 min4 Nov
Port of Spain16:58 → 19:0204:200 min04:2098 min4 Nov
London20:58 → 23:0205:020 min05:04116 min4 Nov
Durban22:58 → 01:0203:350 min03:3485 min4 Nov
Dubai00:58 → 03:0204:450 min04:45103 min4 Nov
Delhi02:28 → 04:3204:510 min04:51104 min4 Nov
Kolkata02:28 → 04:3204:000 min04:01102 min4 Nov
Singapore04:28 → 06:3204:410 min04:4196 min4 Nov
Sydney07:58 → 10:0204:290 min04:290 min5 Nov
Suva08:58 → 11:0203:570 min03:560 min5 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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