Ruling · Naraka Caturdaśī (Choti Diwali) · 2052

Monday 21 October

Determinatein Baoding, under the Rashtriya Panchang method. Clear of every threshold by 440 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 21 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

Dawn of Tuesday 22 October

Caturdaśī is absent from aruṇodaya. Not taken.

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

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 20:22 on Sun 20 Oct to 21:31 on Mon 21 Oct.

    2052-10-20T12:21:45Z → 2052-10-21T13:30:50Z

  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 104 of 104 minutes on the 21st and 0 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 26390 s

  5. 05

    Ruling

    Naraka Caturdaśī, Baoding, 2052: Monday 21 October.

    confidence: determinate

Say it like this

In Baoding, Naraka Caturdaśī (Choti Diwali) 2052 falls on Monday 21 October. Caturdaśī runs from 20:22 on Sun 20 Oct to 21:31 on Mon 21 Oct and covers all of aruṇodaya that dawn.

ahargana.org/baoding/festivals/2052/naraka-chaturdashi · pac-rp@2026.1

Who says what

AuthorityKindDate
Ahargaṇa, pac-rpThis rulingMon 21 Oct
Ahargaṇa, classicalDisc centre, no refractionMon 21 Oct
compat-drikpanchangComparison profileMon 21 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 20thCoveredAruṇodaya 21stCoveredRuled
Los Angeles05:22 → 06:3105:21101 min05:2170 min20 Oct
Chicago07:22 → 08:3105:250 min05:26105 min21 Oct
Jersey City08:22 → 09:3105:290 min05:30105 min21 Oct
Port of Spain08:22 → 09:3104:180 min04:1897 min21 Oct
London13:22 → 14:3105:460 min05:47109 min21 Oct
Durban14:22 → 15:3103:440 min03:4388 min21 Oct
Dubai16:22 → 17:3104:400 min04:40101 min21 Oct
Delhi17:52 → 19:0104:440 min04:45101 min21 Oct
Kolkata17:52 → 19:0103:560 min03:56100 min21 Oct
Singapore20:22 → 21:3105:120 min05:1295 min21 Oct
Sydney23:22 → 00:3104:400 min04:3987 min21 Oct
Suva00:22 → 01:3104:030 min04:0291 min21 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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