Ruling · Aghora Caturdaśī · 1977

Sunday 11 September

Boundaryin Baoding, under the Rashtriya Panchang method. A threshold is only 3 min 20 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 Sunday 11 September

Taken. The only evening Caturdaśī reaches.

18:33 sunsetpradoṣa ends 20:05
Caturdaśī begins 18:36:47
18:0918:3318:5719:2119:4520:0920:33

88 of 91 minutes covered, the last 88

Evening of Monday 12 September

Caturdaśī is absent from pradoṣa. Not taken.

18:32 sunsetpradoṣa ends 20:03
Caturdaśī ends 18:15:47
18:0818:3218:5619:2019:4420:0820:32

0 of 91 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 18:37 on Sun 11 Sep to 18:16 on Mon 12 Sep.

    1977-09-11T10:36:47Z → 1977-09-12T10:15:47Z

  2. 02

    Kāla

    Pradoṣa is 2 muhūrtas after sunset: 18:33–20:05 on the 11th, 18:32–20:03 on the 12th.

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

  3. 03

    Rule

    Caturdaśī must be present during pradoṣa. It covers 88 of 91 minutes on the 11th and 0 of 91 on the 12th.

    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 200 s < 300 s

  5. 05

    Ruling

    Aghora Caturdaśī, Baoding, 1977: Sunday 11 September.

    confidence: boundary (margin)

Say it like this

In Baoding, Aghora Caturdaśī 1977 falls on Sunday 11 September. Caturdaśī runs from 18:37 on Sun 11 Sep to 18:16 on Mon 12 Sep and covers 88 of 91 minutes of pradoṣa that evening. It is 3 min 20 s from a threshold: treat the date as contested.

ahargana.org/baoding/festivals/1977/aghora-chaturdashi · pac-rp@2026.1

Who says what

AuthorityKindDate
Ahargaṇa, pac-rpThis rulingSun 11 Sep
Ahargaṇa, classicalDisc centre, no refractionSun 11 Sep
compat-drikpanchangComparison profileSun 11 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 11thCoveredSunset 12thCoveredRuled
Los Angeles03:37 → 03:1619:0592 min19:030 min11 Sep
Chicago05:37 → 05:1619:0791 min19:050 min11 Sep
Jersey City06:37 → 06:1619:1291 min19:100 min11 Sep
Port of Spain06:37 → 06:1618:0994 min18:080 min11 Sep
London11:37 → 11:1619:2489 min19:220 min11 Sep
Durban12:37 → 12:1617:4698 min17:460 min11 Sep
Dubai14:37 → 14:1618:2793 min18:260 min11 Sep
Delhi16:07 → 15:4618:3192 min18:300 min11 Sep
Kolkata16:07 → 15:4617:4493 min17:430 min11 Sep
Singapore18:07 → 17:4618:3595 min18:340 min11 Sep
Sydney20:37 → 20:1617:430 min17:4498 min12 Sep
Suva22:37 → 22:1618:000 min18:0097 min12 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

About Ahargaṇa