Ruling · Naraka Caturdaśī (Choti Diwali) · 2027

Thursday 28 October

Determinatein Ujjain, under the Rashtriya Panchang method. Clear of every threshold by 358 minutes.

Decide it for

23°11′ N 75°47′ E · Asia/Kolkata · GeoNames 1253914

The two dawns

One ghaṭī is 24 minutes. Aruṇodaya is 2 muhūrtas before sunrise.

Dawn of Thursday 28 October

Taken. The only dawn Caturdaśī reaches.

04:49 aruṇodaya beginssunrise 06:30
04:2504:4905:1305:3706:0106:2506:49

101 of 101 minutes covered

Dawn of Friday 29 October

Caturdaśī is absent from aruṇodaya. Not taken.

04:49 aruṇodaya beginssunrise 06:30
04:2504:4905:1305:3706:0106:2506:49

0 of 101 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 22:50 on Wed 27 Oct to 20:49 on Thu 28 Oct.

    2027-10-27T17:20:21Z → 2027-10-28T15:18:36Z

  2. 02

    Kāla

    Aruṇodaya is 2 muhūrtas before sunrise: 04:49–06:30 on the 28th, 04:49–06:30 on the 29th.

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

  3. 03

    Rule

    Caturdaśī must be present during aruṇodaya. It covers 101 of 101 minutes on the 28th and 0 of 101 on the 29th.

    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 21509 s

  5. 05

    Ruling

    Naraka Caturdaśī, Ujjain, 2027: Thursday 28 October.

    confidence: determinate

Say it like this

In Ujjain, Naraka Caturdaśī (Choti Diwali) 2027 falls on Thursday 28 October. Caturdaśī runs from 22:50 on Wed 27 Oct to 20:49 on Thu 28 Oct and covers all of aruṇodaya that dawn.

ahargana.org/ujjain/festivals/2027/naraka-chaturdashi · pac-rp@2026.1

Who says what

AuthorityKindDate
Ahargaṇa, pac-rpThis rulingThu 28 Oct
Ahargaṇa, classicalDisc centre, no refractionThu 28 Oct
compat-drikpanchangComparison profileThu 28 Oct
No institution has a recorded ruling for Ujjain.

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 27thCoveredAruṇodaya 28thCoveredRuled
Los Angeles10:20 → 08:1905:240 min05:25105 min28 Oct
Chicago12:20 → 10:1905:300 min05:31108 min28 Oct
Jersey City13:20 → 11:1905:340 min05:35107 min28 Oct
Port of Spain13:20 → 11:1904:190 min04:1998 min28 Oct
London18:20 → 16:1905:530 min05:54113 min28 Oct
Durban19:20 → 17:1903:390 min03:3987 min28 Oct
Dubai21:20 → 19:1904:420 min04:42102 min28 Oct
Delhi22:50 → 20:4904:470 min04:47103 min28 Oct
Kolkata22:50 → 20:4903:580 min03:58101 min28 Oct
Singapore01:20 → 23:1905:110 min05:1195 min28 Oct
Sydney04:20 → 02:1904:350 min04:3486 min28 Oct
Suva05:20 → 03:1904:000 min03:599 min28 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