Ruling · Naraka Caturdaśī (Choti Diwali) · 1921

Sunday 30 October

Determinatein Baoding, under the Rashtriya Panchang method. Clear of every threshold by 165 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 29 October

Caturdaśī is absent from aruṇodaya. Not taken.

04:55 aruṇodaya beginssunrise 06:41
04:3104:5505:1905:4306:0706:3106:55

0 of 106 minutes covered

Dawn of Sunday 30 October

Taken. The only dawn Caturdaśī reaches.

04:56 aruṇodaya beginssunrise 06:42
04:3204:5605:2005:4406:0806:3206:56

107 of 107 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 11:35 on Sat 29 Oct to 09:27 on Sun 30 Oct.

    1921-10-29T03:35:15Z → 1921-10-30T01:27:22Z

  2. 02

    Kāla

    Aruṇodaya is 2 muhūrtas before sunrise: 04:55–06:41 on the 29th, 04:56–06:42 on the 30th.

    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 106 minutes on the 29th and 107 of 107 on the 30th.

    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 9895 s

  5. 05

    Ruling

    Naraka Caturdaśī, Baoding, 1921: Sunday 30 October.

    confidence: determinate

Say it like this

In Baoding, Naraka Caturdaśī (Choti Diwali) 1921 falls on Sunday 30 October. Caturdaśī runs from 11:35 on Sat 29 Oct to 09:27 on Sun 30 Oct and covers all of aruṇodaya that dawn.

ahargana.org/baoding/festivals/1921/naraka-chaturdashi · pac-rp@2026.1

Who says what

AuthorityKindDate
Ahargaṇa, pac-rpThis rulingSun 30 Oct
Ahargaṇa, classicalDisc centre, no refractionSun 30 Oct
compat-drikpanchangComparison profileSun 30 Oct
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 29thCoveredAruṇodaya 30thCoveredRuled
Los Angeles19:35 → 17:2704:25105 min04:260 min29 Oct
Chicago22:35 → 20:2705:31108 min04:320 min29 Oct
Jersey City22:35 → 20:2704:36107 min04:370 min29 Oct
Port of Spain23:35 → 21:2704:1998 min04:190 min29 Oct
London03:35 → 01:2704:55113 min04:570 min29 Oct
Durban05:35 → 03:2703:380 min03:380 min29 Oct
Dubai07:35 → 05:2704:430 min04:4344 min30 Oct
Delhi09:05 → 06:5704:480 min04:48103 min30 Oct
Kolkata09:05 → 06:5703:580 min03:59101 min30 Oct
Singapore10:35 → 08:2704:110 min04:1195 min30 Oct
Sydney13:35 → 11:2703:340 min03:3385 min30 Oct
Suva15:35 → 13:2703:590 min03:5890 min30 Oct
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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