Ruling · Naraka Caturdaśī (Choti Diwali) · 1977

Thursday 10 November

Determinatein Baoding, under the Rashtriya Panchang method. Clear of every threshold by 475 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 Thursday 10 November

Taken. The only dawn Caturdaśī reaches.

05:05 aruṇodaya beginssunrise 06:55
04:4105:0505:2905:5306:1706:4107:0507:29

110 of 110 minutes covered

Dawn of Friday 11 November

Caturdaśī is absent from aruṇodaya. Not taken.

05:06 aruṇodaya beginssunrise 06:56
04:4205:0605:3005:5406:1806:4207:0607:30

0 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 21:10 on Wed 9 Nov to 18:22 on Thu 10 Nov.

    1977-11-09T13:09:33Z → 1977-11-10T10:22:22Z

  2. 02

    Kāla

    Aruṇodaya is 2 muhūrtas before sunrise: 05:05–06:55 on the 10th, 05:06–06:56 on the 11th.

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

  3. 03

    Rule

    Caturdaśī must be present during aruṇodaya. It covers 110 of 110 minutes on the 10th and 0 of 110 on the 11th.

    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 28522 s

  5. 05

    Ruling

    Naraka Caturdaśī, Baoding, 1977: Thursday 10 November.

    confidence: determinate

Say it like this

In Baoding, Naraka Caturdaśī (Choti Diwali) 1977 falls on Thursday 10 November. Caturdaśī runs from 21:10 on Wed 9 Nov to 18:22 on Thu 10 Nov and covers all of aruṇodaya that dawn.

ahargana.org/baoding/festivals/1977/naraka-chaturdashi · pac-rp@2026.1

Who says what

AuthorityKindDate
Ahargaṇa, pac-rpThis rulingThu 10 Nov
Ahargaṇa, classicalDisc centre, no refractionThu 10 Nov
compat-drikpanchangComparison profileThu 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 Angeles05:10 → 02:2204:3371 min04:340 min9 Nov
Chicago07:10 → 04:2204:420 min04:430 min9 Nov
Jersey City08:10 → 05:2204:450 min04:4636 min10 Nov
Port of Spain09:10 → 06:2204:210 min04:2199 min10 Nov
London13:10 → 10:2205:100 min05:11119 min10 Nov
Durban15:10 → 12:2203:320 min03:3184 min10 Nov
Dubai17:10 → 14:2204:480 min04:48104 min10 Nov
Delhi18:40 → 15:5204:540 min04:55105 min10 Nov
Kolkata18:40 → 15:5204:030 min04:03103 min10 Nov
Singapore20:40 → 17:5204:410 min04:4196 min10 Nov
Sydney00:10 → 21:2204:260 min04:2582 min10 Nov
Suva01:10 → 22:2203:550 min03:5589 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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