Ruling · Aghora Caturdaśī · 1921

Wednesday 31 August

Determinatein Daqing, under the Rashtriya Panchang method. Clear of every threshold by 36 minutes.

Decide it for

DaqingDelhiKolkataSingaporeSydneyJersey City

46°35′ N 125°00′ E · Asia/Shanghai · GeoNames 2037860

The two evenings

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

Evening of Wednesday 31 August

Taken. The only evening Caturdaśī reaches.

18:23 sunsetpradoṣa ends 19:47
Caturdaśī begins 18:58:33
17:5918:2318:4719:1119:3519:5920:23

49 of 85 minutes covered, the last 49

Evening of Thursday 1 September

Caturdaśī is absent from pradoṣa. Not taken.

18:21 sunsetpradoṣa ends 19:46
17:5718:2118:4519:0919:3319:5720:21

0 of 85 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 18:59 on Wed 31 Aug to 15:15 on Thu 1 Sep.

    1921-08-31T10:58:33Z → 1921-09-01T07:14:51Z

  2. 02

    Kāla

    Pradoṣa is 2 muhūrtas after sunset: 18:23–19:47 on the 31st, 18:21–19:46 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 49 of 85 minutes on the 31st and 0 of 85 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 2157 s

  5. 05

    Ruling

    Aghora Caturdaśī, Daqing, 1921: Wednesday 31 August.

    confidence: determinate

Say it like this

In Daqing, Aghora Caturdaśī 1921 falls on Wednesday 31 August. Caturdaśī runs from 18:59 on Wed 31 Aug to 15:15 on Thu 1 Sep and covers 49 of 85 minutes of pradoṣa that evening.

ahargana.org/daqing/festivals/1921/aghora-chaturdashi · pac-rp@2026.1

Who says what

AuthorityKindDate
Ahargaṇa, pac-rpThis rulingWed 31 Aug
Ahargaṇa, classicalDisc centre, no refractionWed 31 Aug
compat-drikpanchangComparison profileWed 31 Aug
No institution has a recorded ruling for Daqing.

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 Angeles02:59 → 23:1518:2089 min18:190 min31 Aug
Chicago05:59 → 02:1519:2687 min19:240 min31 Aug
Jersey City06:59 → 03:1519:3187 min19:290 min31 Aug
Port of Spain06:59 → 03:1518:1693 min18:150 min31 Aug
London11:59 → 08:1519:5083 min19:480 min31 Aug
Durban12:59 → 09:1517:40100 min17:400 min31 Aug
Dubai14:59 → 11:1518:3991 min18:380 min31 Aug
Delhi16:29 → 12:4518:4490 min18:430 min31 Aug
Kolkata16:29 → 12:4517:5591 min17:540 min31 Aug
Singapore17:59 → 14:1518:0995 min18:090 min31 Aug
Sydney20:59 → 17:1517:360 min17:360 min31 Aug
Suva22:59 → 19:1517:580 min17:5976 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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