Ruling · Aghora Caturdaśī · 1978

Friday 1 September

Boundaryin Baoding, under the Rashtriya Panchang method. A threshold is only 2 min 25 s away. Say “contested”.

Decide it for

BaodingDelhiKolkataSingaporeSydneyJersey City

38°52′ N 115°28′ E · Asia/Shanghai · GeoNames 1816971

The two evenings

One ghaṭī is 24 minutes. Pradoṣa is 2 muhūrtas after sunset.

Evening of Thursday 31 August

Caturdaśī is absent from pradoṣa. Not taken.

18:51 sunsetpradoṣa ends 20:18
Caturdaśī begins 20:20:46
18:2718:5119:1519:3920:0320:2720:51

0 of 87 minutes covered

Evening of Friday 1 September

Taken. The only evening Caturdaśī reaches.

18:49 sunsetpradoṣa ends 20:17
18:2518:4919:1319:3720:0120:2520:49

88 of 88 minutes covered

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

How it was decided

  1. 01

    Aṅga

    Caturdaśī runs from 20:21 on Thu 31 Aug to 22:25 on Fri 1 Sep.

    1978-08-31T12:20:47Z → 1978-09-01T14:24:36Z

  2. 02

    Kāla

    Pradoṣa is 2 muhūrtas after sunset: 18:51–20:18 on the 31st, 18:49–20:17 on the 1st.

    pradosha: night-muhurta-1-2 · sunrise and sunset: upper limb, 31′ + 16′

  3. 03

    Rule

    Caturdaśī must be present during pradoṣa. It covers 0 of 87 minutes on the 31st and 88 of 88 on the 1st.

    Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 103

  4. 04

    Tie-break

    Only one evening qualifies. No tie-break is needed.

    priority: unstated → only-day · margin 145 s < 300 s

  5. 05

    Ruling

    Aghora Caturdaśī, Baoding, 1978: Friday 1 September.

    confidence: boundary (margin)

Say it like this

In Baoding, Aghora Caturdaśī 1978 falls on Friday 1 September. Caturdaśī runs from 20:21 on Thu 31 Aug to 22:25 on Fri 1 Sep and covers all of pradoṣa that evening. It is 2 min 25 s from a threshold: treat the date as contested.

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

Who says what

AuthorityKindDate
Ahargaṇa, pac-rpThis rulingFri 1 Sep
Ahargaṇa, classicalDisc centre, no refractionFri 1 Sep
compat-drikpanchangComparison profileFri 1 Sep
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/aghora-chaturdashi · ruleset 2026.3-draft

Month
Śrāvaṇa, amānta
Pakṣa · aṅga
Kṛṣṇa · Caturdaśī
Kāla
Pradoṣa
Priority
Unstated
Tie-break
Longer coverage, as a boundary
Reference
CRC 1955, p. 103

“K 14 Aghora caturdasi (pradosa vyapini).” Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 103.

The same rule, elsewhere

Twelve places, west to east. Local clock times.

PlaceCaturdaśīSunset 31stCoveredSunset 1stCoveredRuled
Los Angeles05:21 → 07:2519:2089 min19:190 min31 Aug
Chicago07:21 → 09:2519:2687 min19:240 min31 Aug
Jersey City08:21 → 10:2519:3087 min19:290 min31 Aug
Port of Spain08:21 → 10:2518:1693 min18:150 min31 Aug
London13:21 → 15:2519:5083 min19:470 min31 Aug
Durban14:21 → 16:2517:40100 min17:400 min31 Aug
Dubai16:21 → 18:2518:3991 min18:380 min31 Aug
Delhi17:51 → 19:5518:4490 min18:4372 min31 Aug
Kolkata17:51 → 19:5517:5591 min17:5491 min1 Sep
Singapore19:51 → 21:5518:3923 min18:3995 min1 Sep
Sydney22:21 → 00:2517:360 min17:36101 min1 Sep
Suva00:21 → 02:2517:590 min17:5998 min1 Sep
Profile · tradition
pac-rp@2026.1 · smarta
Rule
aghora-chaturdashi@2026.3-draft
Engine · kernel
0.1.0 · de440 7eef…ea74
Boundary margin
300 s

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