Ruling · Naraka Caturdaśī (Choti Diwali) · 1968

Monday 21 October

Determinatein Baoding, under the Rashtriya Panchang method. Clear of every threshold by 118 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 Sunday 20 October

Caturdaśī is absent from aruṇodaya. Not taken.

04:49 aruṇodaya beginssunrise 06:32
04:2504:4905:1305:3706:0106:2506:49

0 of 104 minutes covered

Dawn of Monday 21 October

Taken. The only dawn Caturdaśī reaches.

04:49 aruṇodaya beginssunrise 06:34
04:2504:4905:1305:3706:0106:2506:49

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 10:50 on Sun 20 Oct to 08:31 on Mon 21 Oct.

    1968-10-20T02:49:36Z → 1968-10-21T00:31:11Z

  2. 02

    Kāla

    Aruṇodaya is 2 muhūrtas before sunrise: 04:49–06:32 on the 20th, 04:49–06:34 on the 21st.

    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 104 minutes on the 20th and 104 of 104 on the 21st.

    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 7060 s

  5. 05

    Ruling

    Naraka Caturdaśī, Baoding, 1968: Monday 21 October.

    confidence: determinate

Say it like this

In Baoding, Naraka Caturdaśī (Choti Diwali) 1968 falls on Monday 21 October. Caturdaśī runs from 10:50 on Sun 20 Oct to 08:31 on Mon 21 Oct and covers all of aruṇodaya that dawn.

ahargana.org/baoding/festivals/1968/naraka-chaturdashi · pac-rp@2026.1

Who says what

AuthorityKindDate
Ahargaṇa, pac-rpThis rulingMon 21 Oct
Ahargaṇa, classicalDisc centre, no refractionMon 21 Oct
compat-drikpanchangComparison profileMon 21 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 20thCoveredAruṇodaya 21stCoveredRuled
Los Angeles19:50 → 17:3105:20103 min05:210 min20 Oct
Chicago21:50 → 19:3105:24105 min05:250 min20 Oct
Jersey City22:50 → 20:3105:29105 min05:300 min20 Oct
Port of Spain22:50 → 20:3104:1897 min04:180 min20 Oct
London03:50 → 01:3105:45109 min05:460 min20 Oct
Durban04:50 → 02:3103:4423 min03:440 min20 Oct
Dubai06:50 → 04:3104:390 min04:400 min20 Oct
Delhi08:20 → 06:0104:440 min04:4477 min21 Oct
Kolkata08:20 → 06:0103:560 min03:56100 min21 Oct
Singapore10:20 → 08:0104:420 min04:4295 min21 Oct
Sydney12:50 → 10:3103:410 min03:4087 min21 Oct
Suva14:50 → 12:3104:030 min04:0291 min21 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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