Ruling · Naraka Caturdaśī (Choti Diwali) · 1957

Tuesday 22 October

Determinatein Baoding, under the Rashtriya Panchang method. Clear of every threshold by 557 minutes.

Decide it for

BaodingDelhiKolkataSingaporeSydneyJersey City

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 21 October

Caturdaśī is absent from aruṇodaya. Not taken.

04:49 aruṇodaya beginssunrise 06:33
04:2504:4905:1305:3706:0106:2506:49

0 of 104 minutes covered

Dawn of Tuesday 22 October

Taken. The only dawn Caturdaśī reaches.

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

104 of 104 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 19:09 on Mon 21 Oct to 15:51 on Tue 22 Oct.

    1957-10-21T11:08:51Z → 1957-10-22T07:51:25Z

  2. 02

    Kāla

    Aruṇodaya is 2 muhūrtas before sunrise: 04:49–06:33 on the 21st, 04:50–06:34 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 104 of 104 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 33432 s

  5. 05

    Ruling

    Naraka Caturdaśī, Baoding, 1957: Tuesday 22 October.

    confidence: determinate

Say it like this

In Baoding, Naraka Caturdaśī (Choti Diwali) 1957 falls on Tuesday 22 October. Caturdaśī runs from 19:09 on Mon 21 Oct to 15:51 on Tue 22 Oct and covers all of aruṇodaya that dawn.

ahargana.org/baoding/festivals/1957/naraka-chaturdashi · pac-rp@2026.1

Who says what

AuthorityKindDate
Ahargaṇa, pac-rpThis rulingTue 22 Oct
Ahargaṇa, classicalDisc centre, no refractionTue 22 Oct
compat-drikpanchangComparison profileTue 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 Angeles03:09 → 23:5104:20103 min04:210 min21 Oct
Chicago06:09 → 02:5105:2561 min05:260 min21 Oct
Jersey City07:09 → 03:5105:295 min05:300 min21 Oct
Port of Spain07:09 → 03:5104:180 min04:180 min21 Oct
London11:09 → 07:5104:460 min04:47110 min22 Oct
Durban13:09 → 09:5103:440 min03:4388 min22 Oct
Dubai15:09 → 11:5104:400 min04:40101 min22 Oct
Delhi16:39 → 13:2104:440 min04:45101 min22 Oct
Kolkata16:39 → 13:2103:560 min03:56100 min22 Oct
Singapore18:39 → 15:2104:420 min04:4295 min22 Oct
Sydney21:09 → 17:5103:400 min03:3987 min22 Oct
Suva23:09 → 19:5104:020 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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