Ruling · Naraka Caturdaśī (Choti Diwali) · 1900

Monday 22 October

Determinatein Baoding, under the Rashtriya Panchang method. Clear of every threshold by 589 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 Monday 22 October

Taken. The only dawn Caturdaśī reaches.

04:55 aruṇodaya beginssunrise 06:39
04:3104:5505:1905:4306:0706:3106:55

104 of 104 minutes covered

Dawn of Tuesday 23 October

Caturdaśī is absent from aruṇodaya. Not taken.

04:56 aruṇodaya beginssunrise 06:40
04:3204:5605:2005:4406:0806:3206:56

0 of 105 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 16:34 on Sun 21 Oct to 19:06 on Mon 22 Oct.

    1900-10-21T08:29:28Z → 1900-10-22T11:01:28Z

  2. 02

    Kāla

    Aruṇodaya is 2 muhūrtas before sunrise: 04:55–06:39 on the 22nd, 04:56–06:40 on the 23rd.

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

  3. 03

    Rule

    Caturdaśī must be present during aruṇodaya. It covers 104 of 104 minutes on the 22nd and 0 of 105 on the 23rd.

    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 35344 s

  5. 05

    Ruling

    Naraka Caturdaśī, Baoding, 1900: Monday 22 October.

    confidence: determinate

Say it like this

In Baoding, Naraka Caturdaśī (Choti Diwali) 1900 falls on Monday 22 October. Caturdaśī runs from 16:34 on Sun 21 Oct to 19:06 on Mon 22 Oct and covers all of aruṇodaya that dawn.

ahargana.org/baoding/festivals/1900/naraka-chaturdashi · pac-rp@2026.1

Who says what

AuthorityKindDate
Ahargaṇa, pac-rpThis rulingMon 22 Oct
Ahargaṇa, classicalDisc centre, no refractionMon 22 Oct
compat-drikpanchangComparison profileMon 22 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 21stCoveredAruṇodaya 22ndCoveredRuled
Los Angeles00:29 → 03:0104:20103 min04:210 min21 Oct
Chicago02:29 → 05:0104:25105 min04:2636 min21 Oct
Jersey City03:29 → 06:0104:29105 min04:3091 min21 Oct
Port of Spain04:29 → 07:0104:1886 min04:1897 min21 Oct
London08:29 → 11:0104:450 min04:47109 min22 Oct
Durban09:59 → 12:3103:140 min03:1388 min22 Oct
Dubai12:10 → 14:4204:210 min04:21100 min22 Oct
Delhi13:50 → 16:2204:350 min04:36101 min22 Oct
Kolkata13:50 → 16:2203:470 min03:47100 min22 Oct
Singapore15:24 → 17:5604:070 min04:0795 min22 Oct
Sydney18:29 → 21:0103:400 min03:4087 min22 Oct
Suva20:24 → 22:5603:580 min03:5791 min22 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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