Ruling · Naraka Caturdaśī (Choti Diwali) · 2090

Sunday 22 October

Determinatein Baoding, under the Rashtriya Panchang method. Clear of every threshold by 424 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 21 October

Caturdaśī is absent from aruṇodaya. Not taken.

04:50 aruṇodaya beginssunrise 06:34
04:2604:5005:1405:3806:0206:2606:50

0 of 104 minutes covered

Dawn of Sunday 22 October

Taken. The only dawn Caturdaśī reaches.

04:51 aruṇodaya beginssunrise 06:35
04:2704:5105:1505:3906:0306:2706:51

105 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 17:09 on Sat 21 Oct to 13:39 on Sun 22 Oct.

    2090-10-21T09:08:43Z → 2090-10-22T05:39:27Z

  2. 02

    Kāla

    Aruṇodaya is 2 muhūrtas before sunrise: 04:50–06:34 on the 21st, 04:51–06:35 on the 22nd.

    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 104 minutes on the 21st and 105 of 105 on the 22nd.

    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 25453 s

  5. 05

    Ruling

    Naraka Caturdaśī, Baoding, 2090: Sunday 22 October.

    confidence: determinate

Say it like this

In Baoding, Naraka Caturdaśī (Choti Diwali) 2090 falls on Sunday 22 October. Caturdaśī runs from 17:09 on Sat 21 Oct to 13:39 on Sun 22 Oct and covers all of aruṇodaya that dawn.

ahargana.org/baoding/festivals/2090/naraka-chaturdashi · pac-rp@2026.1

Who says what

AuthorityKindDate
Ahargaṇa, pac-rpThis rulingSun 22 Oct
Ahargaṇa, classicalDisc centre, no refractionSun 22 Oct
compat-drikpanchangComparison profileSun 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 Angeles02:09 → 22:3905:21103 min05:220 min21 Oct
Chicago04:09 → 00:3905:26105 min05:260 min21 Oct
Jersey City05:09 → 01:3905:30105 min05:310 min21 Oct
Port of Spain05:09 → 01:3904:1947 min04:190 min21 Oct
London10:09 → 06:3905:470 min05:4852 min22 Oct
Durban11:09 → 07:3903:430 min03:4388 min22 Oct
Dubai13:09 → 09:3904:400 min04:41101 min22 Oct
Delhi14:39 → 11:0904:450 min04:45102 min22 Oct
Kolkata14:39 → 11:0903:560 min03:57100 min22 Oct
Singapore17:09 → 13:3905:120 min05:1295 min22 Oct
Sydney20:09 → 16:3904:400 min04:3987 min22 Oct
Suva21:09 → 17:3904:020 min04:0291 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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