Ruling · Naraka Caturdaśī (Choti Diwali) · 1979

Saturday 20 October

Determinatein Baoding, under the Rashtriya Panchang method. Clear of every threshold by 8 min 06 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 Friday 19 October

Caturdaśī is absent from aruṇodaya. Not taken.

04:48 aruṇodaya beginssunrise 06:31
Caturdaśī begins 06:38:52
04:2404:4805:1205:3606:0006:2406:48

0 of 103 minutes covered

Dawn of Saturday 20 October

Taken. The only dawn Caturdaśī reaches.

04:48 aruṇodaya beginssunrise 06:32
04:2404:4805:1205:3606:0006:2406:48

104 of 104 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 06:39 on Fri 19 Oct to 08:44 on Sat 20 Oct.

    1979-10-18T22:38:52Z → 1979-10-20T00:43:49Z

  2. 02

    Kāla

    Aruṇodaya is 2 muhūrtas before sunrise: 04:48–06:31 on the 19th, 04:48–06:32 on the 20th.

    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 103 minutes on the 19th and 104 of 104 on the 20th.

    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 486 s

  5. 05

    Ruling

    Naraka Caturdaśī, Baoding, 1979: Saturday 20 October.

    confidence: determinate

Say it like this

In Baoding, Naraka Caturdaśī (Choti Diwali) 1979 falls on Saturday 20 October. Caturdaśī runs from 06:39 on Fri 19 Oct to 08:44 on Sat 20 Oct and covers all of aruṇodaya that dawn.

ahargana.org/baoding/festivals/1979/naraka-chaturdashi · pac-rp@2026.1

Who says what

AuthorityKindDate
Ahargaṇa, pac-rpThis rulingSat 20 Oct
Ahargaṇa, classicalDisc centre, no refractionSat 20 Oct
compat-drikpanchangComparison profileSat 20 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 18thCoveredAruṇodaya 20thCoveredRuled
Los Angeles15:39 → 17:4405:190 min05:200 min19 Oct
Chicago17:39 → 19:4405:220 min05:240 min19 Oct
Jersey City18:39 → 20:4405:270 min05:280 min19 Oct
Port of Spain18:39 → 20:4404:180 min04:180 min19 Oct
London23:39 → 01:4405:410 min05:440 min19 Oct
Durban00:39 → 02:4403:470 min03:450 min19 Oct
Dubai02:39 → 04:4404:390 min04:395 min19 Oct
Delhi04:09 → 06:1404:430 min04:4490 min19 Oct
Kolkata04:09 → 06:1403:550 min03:55100 min19 Oct
Singapore06:09 → 08:1404:420 min04:4295 min19 Oct
Sydney08:39 → 10:4403:430 min03:4188 min20 Oct
Suva10:39 → 12:4404:040 min04:0392 min20 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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