Ruling · Naraka Caturdaśī (Choti Diwali) · 1952

Friday 17 October

Determinatein Baoding, under the Rashtriya Panchang method. Clear of every threshold by 11 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 17 October

Taken. Both dawns qualify; the rule takes the first.

04:47 aruṇodaya beginssunrise 06:29
Caturdaśī begins 04:36:02
04:2304:4705:1105:3505:5906:2306:47

103 of 103 minutes covered

Dawn of Saturday 18 October

Qualifies with 68 of 103 minutes. Not taken.

04:47 aruṇodaya beginssunrise 06:30
Caturdaśī ends 05:55:24
04:2304:4705:1105:3505:5906:2306:47

68 of 103 minutes covered, the first 68

Caturdaśī presentAruṇodaya, the window the rule readsThe instant the tithi begins or ends

How it was decided

  1. 01

    Aṅga

    Caturdaśī runs from 04:36 on Fri 17 Oct to 05:55 on Sat 18 Oct.

    1952-10-16T20:36:03Z → 1952-10-17T21:55:24Z

  2. 02

    Kāla

    Aruṇodaya is 2 muhūrtas before sunrise: 04:47–06:29 on the 17th, 04:47–06:30 on the 18th.

    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 17th and 68 of 103 on the 18th.

    Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 104

  4. 04

    Tie-break

    Both dawns qualify. Pūrvaviddhā: the first is taken.

    priority: purvaviddha → purvaviddha · margin 631 s

  5. 05

    Ruling

    Naraka Caturdaśī, Baoding, 1952: Friday 17 October.

    confidence: determinate

Say it like this

In Baoding, Naraka Caturdaśī (Choti Diwali) 1952 falls on Friday 17 October. Caturdaśī runs from 04:36 on Fri 17 Oct to 05:55 on Sat 18 Oct and covers all of aruṇodaya that dawn. It also reaches the next dawn for 68 minutes; by the rule the first dawn is taken.

ahargana.org/baoding/festivals/1952/naraka-chaturdashi · pac-rp@2026.1

Who says what

AuthorityKindDate
Ahargaṇa, pac-rpThis rulingFri 17 Oct
Ahargaṇa, classicalDisc centre, no refractionFri 17 Oct
compat-drikpanchangComparison profileFri 17 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 16thCoveredAruṇodaya 17thCoveredRuled
Los Angeles12:36 → 13:5504:180 min04:18102 min17 Oct
Chicago14:36 → 15:5504:210 min04:22104 min17 Oct
Jersey City15:36 → 16:5504:260 min04:27103 min17 Oct
Port of Spain16:36 → 17:5504:180 min04:1897 min17 Oct
London21:36 → 22:5505:400 min05:41107 min17 Oct
Durban22:36 → 23:5503:480 min03:4789 min17 Oct
Dubai00:36 → 01:5504:380 min04:38100 min17 Oct
Delhi02:06 → 03:2504:420 min04:43100 min17 Oct
Kolkata02:06 → 03:2503:550 min03:5599 min17 Oct
Singapore04:06 → 05:2504:430 min04:4295 min17 Oct
Sydney06:36 → 07:5503:450 min03:440 min18 Oct
Suva08:36 → 09:5504:050 min04:050 min18 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