Ruling · Naraka Caturdaśī (Choti Diwali) · 1978

Monday 30 October

Determinatein Baoding, under the Rashtriya Panchang method. Clear of every threshold by 8 min 45 s.

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 30 October

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

04:56 aruṇodaya beginssunrise 06:43
Caturdaśī begins 05:27:00
04:3204:5605:2005:4406:0806:3206:56

76 of 107 minutes covered, the last 76

Dawn of Tuesday 31 October

Qualifies with 9 of 107 minutes. Not taken.

04:57 aruṇodaya beginssunrise 06:44
Caturdaśī ends 05:05:21
04:3304:5705:2105:4506:0906:3306:57

9 of 107 minutes covered, the first 9

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

How it was decided

  1. 01

    Aṅga

    Caturdaśī runs from 05:27 on Mon 30 Oct to 05:05 on Tue 31 Oct.

    1978-10-29T21:27:00Z → 1978-10-30T21:05:21Z

  2. 02

    Kāla

    Aruṇodaya is 2 muhūrtas before sunrise: 04:56–06:43 on the 30th, 04:57–06:44 on the 31st.

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

  3. 03

    Rule

    Caturdaśī must be present during aruṇodaya. It covers 76 of 107 minutes on the 30th and 9 of 107 on the 31st.

    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 525 s

  5. 05

    Ruling

    Naraka Caturdaśī, Baoding, 1978: Monday 30 October.

    confidence: determinate

Say it like this

In Baoding, Naraka Caturdaśī (Choti Diwali) 1978 falls on Monday 30 October. Caturdaśī runs from 05:27 on Mon 30 Oct to 05:05 on Tue 31 Oct and covers 76 of 107 minutes of aruṇodaya that dawn. It also reaches the next dawn for 9 minutes; by the rule the first dawn is taken.

ahargana.org/baoding/festivals/1978/naraka-chaturdashi · pac-rp@2026.1

Who says what

AuthorityKindDate
Ahargaṇa, pac-rpThis rulingMon 30 Oct
Ahargaṇa, classicalDisc centre, no refractionMon 30 Oct
compat-drikpanchangComparison profileMon 30 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 29thCoveredAruṇodaya 30thCoveredRuled
Los Angeles13:27 → 13:0504:250 min04:26105 min30 Oct
Chicago15:27 → 15:0504:310 min04:32108 min30 Oct
Jersey City16:27 → 16:0504:360 min04:37108 min30 Oct
Port of Spain17:27 → 17:0504:190 min04:1998 min30 Oct
London21:27 → 21:0504:550 min04:57113 min30 Oct
Durban23:27 → 23:0503:380 min03:3787 min30 Oct
Dubai01:27 → 01:0504:430 min04:43102 min30 Oct
Delhi02:57 → 02:3504:480 min04:48103 min30 Oct
Kolkata02:57 → 02:3503:580 min03:59101 min30 Oct
Singapore04:57 → 04:3504:410 min04:4179 min30 Oct
Sydney08:27 → 08:0504:340 min04:330 min31 Oct
Suva09:27 → 09:0503:590 min03:580 min31 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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