Ruling · Naraka Caturdaśī (Choti Diwali) · 1903

Monday 19 October

Determinatein Baoding, under the Rashtriya Panchang method. Clear of every threshold by 95 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 19 October

Taken. The only dawn Caturdaśī reaches.

04:47 aruṇodaya beginssunrise 06:30
04:2304:4705:1105:3505:5906:2306:47

103 of 103 minutes covered

Dawn of Tuesday 20 October

Caturdaśī is absent from aruṇodaya. Not taken.

04:48 aruṇodaya beginssunrise 06:31
04:2404:4805:1205:3606:0006:2406:48

0 of 103 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 03:12 on Mon 19 Oct to 01:11 on Tue 20 Oct.

    1903-10-18T19:12:17Z → 1903-10-19T17:11:22Z

  2. 02

    Kāla

    Aruṇodaya is 2 muhūrtas before sunrise: 04:47–06:30 on the 19th, 04:48–06:31 on the 20th.

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

  3. 03

    Rule

    Caturdaśī must be present during aruṇodaya. It covers 103 of 103 minutes on the 19th and 0 of 103 on the 20th.

    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 5694 s

  5. 05

    Ruling

    Naraka Caturdaśī, Baoding, 1903: Monday 19 October.

    confidence: determinate

Say it like this

In Baoding, Naraka Caturdaśī (Choti Diwali) 1903 falls on Monday 19 October. Caturdaśī runs from 03:12 on Mon 19 Oct to 01:11 on Tue 20 Oct and covers all of aruṇodaya that dawn.

ahargana.org/baoding/festivals/1903/naraka-chaturdashi · pac-rp@2026.1

Who says what

AuthorityKindDate
Ahargaṇa, pac-rpThis rulingMon 19 Oct
Ahargaṇa, classicalDisc centre, no refractionMon 19 Oct
compat-drikpanchangComparison profileMon 19 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 18thCoveredAruṇodaya 19thCoveredRuled
Los Angeles11:12 → 09:1104:180 min04:19102 min19 Oct
Chicago13:12 → 11:1104:220 min04:22104 min19 Oct
Jersey City14:12 → 12:1104:260 min04:27104 min19 Oct
Port of Spain15:12 → 13:1104:180 min04:1897 min19 Oct
London19:12 → 17:1104:410 min04:42108 min19 Oct
Durban21:12 → 19:1103:470 min03:4689 min19 Oct
Dubai22:53 → 20:5204:190 min04:20100 min19 Oct
Delhi00:33 → 22:3204:340 min04:34101 min19 Oct
Kolkata00:33 → 22:3203:460 min03:4699 min19 Oct
Singapore02:07 → 00:0604:070 min04:0795 min19 Oct
Sydney05:12 → 03:1103:440 min03:430 min19 Oct
Suva07:07 → 05:0604:000 min03:590 min20 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

About Ahargaṇa