Ruling · Naraka Caturdaśī (Choti Diwali) · 2009

Saturday 17 October

Determinatein Baoding, under the Rashtriya Panchang method. Clear of every threshold by 517 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 16 October

Caturdaśī is absent from aruṇodaya. Not taken.

04:46 aruṇodaya beginssunrise 06:28
04:2204:4605:1005:3405:5806:2206:46

0 of 102 minutes covered

Dawn of Saturday 17 October

Taken. The only dawn Caturdaśī reaches.

04:47 aruṇodaya beginssunrise 06:29
04:2304:4705:1105:3505:5906:2306:47

103 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 17:01 on Fri 16 Oct to 15:07 on Sat 17 Oct.

    2009-10-16T09:01:15Z → 2009-10-17T07:06:53Z

  2. 02

    Kāla

    Aruṇodaya is 2 muhūrtas before sunrise: 04:46–06:28 on the 16th, 04:47–06:29 on the 17th.

    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 102 minutes on the 16th and 103 of 103 on the 17th.

    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 31043 s

  5. 05

    Ruling

    Naraka Caturdaśī, Baoding, 2009: Saturday 17 October.

    confidence: determinate

Say it like this

In Baoding, Naraka Caturdaśī (Choti Diwali) 2009 falls on Saturday 17 October. Caturdaśī runs from 17:01 on Fri 16 Oct to 15:07 on Sat 17 Oct and covers all of aruṇodaya that dawn.

ahargana.org/baoding/festivals/2009/naraka-chaturdashi · pac-rp@2026.1

Who says what

AuthorityKindDate
Ahargaṇa, pac-rpThis rulingSat 17 Oct
Ahargaṇa, classicalDisc centre, no refractionSat 17 Oct
compat-drikpanchangComparison profileSat 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 Angeles02:01 → 00:0705:18101 min05:180 min16 Oct
Chicago04:01 → 02:0705:21103 min05:220 min16 Oct
Jersey City05:01 → 03:0705:26103 min05:270 min16 Oct
Port of Spain05:01 → 03:0704:1854 min04:180 min16 Oct
London10:01 → 08:0705:400 min05:41107 min17 Oct
Durban11:01 → 09:0703:480 min03:4789 min17 Oct
Dubai13:01 → 11:0704:380 min04:38100 min17 Oct
Delhi14:31 → 12:3704:420 min04:43100 min17 Oct
Kolkata14:31 → 12:3703:550 min03:5599 min17 Oct
Singapore17:01 → 15:0705:130 min05:1295 min17 Oct
Sydney20:01 → 18:0704:450 min04:4488 min17 Oct
Suva21:01 → 19:0704:050 min04:0492 min17 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