Ruling · Naraka Caturdaśī (Choti Diwali) · 2087

Saturday 25 October

Determinatein Baoding, under the Rashtriya Panchang method. Clear of every threshold by 524 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 Friday 24 October

Caturdaśī is absent from aruṇodaya. Not taken.

04:52 aruṇodaya beginssunrise 06:37
04:2804:5205:1605:4006:0406:2806:52

0 of 105 minutes covered

Dawn of Saturday 25 October

Taken. The only dawn Caturdaśī reaches.

04:53 aruṇodaya beginssunrise 06:38
04:2904:5305:1705:4106:0506:2906:53

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 15:21 on Fri 24 Oct to 17:16 on Sat 25 Oct.

    2087-10-24T07:21:25Z → 2087-10-25T09:15:50Z

  2. 02

    Kāla

    Aruṇodaya is 2 muhūrtas before sunrise: 04:52–06:37 on the 24th, 04:53–06:38 on the 25th.

    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 105 minutes on the 24th and 105 of 105 on the 25th.

    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 31464 s

  5. 05

    Ruling

    Naraka Caturdaśī, Baoding, 2087: Saturday 25 October.

    confidence: determinate

Say it like this

In Baoding, Naraka Caturdaśī (Choti Diwali) 2087 falls on Saturday 25 October. Caturdaśī runs from 15:21 on Fri 24 Oct to 17:16 on Sat 25 Oct and covers all of aruṇodaya that dawn.

ahargana.org/baoding/festivals/2087/naraka-chaturdashi · pac-rp@2026.1

Who says what

AuthorityKindDate
Ahargaṇa, pac-rpThis rulingSat 25 Oct
Ahargaṇa, classicalDisc centre, no refractionSat 25 Oct
compat-drikpanchangComparison profileSat 25 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 24thCoveredAruṇodaya 25thCoveredRuled
Los Angeles00:21 → 02:1605:23104 min05:230 min24 Oct
Chicago02:21 → 04:1605:28106 min05:290 min24 Oct
Jersey City03:21 → 05:1605:32106 min05:330 min24 Oct
Port of Spain03:21 → 05:1604:1998 min04:1957 min24 Oct
London08:21 → 10:1605:500 min05:51111 min25 Oct
Durban09:21 → 11:1603:410 min03:4187 min25 Oct
Dubai11:21 → 13:1604:410 min04:41101 min25 Oct
Delhi12:51 → 14:4604:460 min04:47102 min25 Oct
Kolkata12:51 → 14:4603:570 min03:57100 min25 Oct
Singapore15:21 → 17:1605:120 min05:1195 min25 Oct
Sydney18:21 → 20:1604:370 min04:3786 min25 Oct
Suva19:21 → 21:1604:010 min04:0091 min25 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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