Ruling · Jitāṣṭamī (Jitiya) · 2090

Saturday 16 September

Boundaryin Chattogram, under the Rashtriya Panchang method. A threshold is only 4 min 22 s away. Say “contested”.

Decide it for

ChattogramDelhiKolkataSingaporeSydneyJersey City

22°20′ N 91°50′ E · Asia/Dhaka · GeoNames 1205733

The two evenings

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

Evening of Saturday 16 September

Taken. The only evening Aṣṭamī reaches.

17:55 sunsetpradoṣa ends 19:29
Aṣṭamī begins 17:50:32
17:3117:5518:1918:4319:0719:3119:55

94 of 94 minutes covered

Evening of Sunday 17 September

Aṣṭamī is absent from pradoṣa. Not taken.

17:54 sunsetpradoṣa ends 19:28
Aṣṭamī ends 17:37:25
17:3017:5418:1818:4219:0619:3019:54

0 of 94 minutes covered

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

How it was decided

  1. 01

    Aṅga

    Aṣṭamī runs from 17:51 on Sat 16 Sep to 17:37 on Sun 17 Sep.

    2090-09-16T11:50:32Z → 2090-09-17T11:37:26Z

  2. 02

    Kāla

    Pradoṣa is 2 muhūrtas after sunset: 17:55–19:29 on the 16th, 17:54–19:28 on the 17th.

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

  3. 03

    Rule

    Aṣṭamī must be present during pradoṣa. It covers 94 of 94 minutes on the 16th and 0 of 94 on the 17th.

    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 262 s < 300 s

  5. 05

    Ruling

    Jitāṣṭamī, Chattogram, 2090: Saturday 16 September.

    confidence: boundary (margin)

Say it like this

In Chattogram, Jitāṣṭamī (Jitiya) 2090 falls on Saturday 16 September. Aṣṭamī runs from 17:51 on Sat 16 Sep to 17:37 on Sun 17 Sep and covers all of pradoṣa that evening. It is 4 min 22 s from a threshold: treat the date as contested.

ahargana.org/chattogram/festivals/2090/jitashtami · pac-rp@2026.1

Who says what

AuthorityKindDate
Ahargaṇa, pac-rpThis rulingSat 16 Sep
Ahargaṇa, classicalDisc centre, no refractionSat 16 Sep
compat-drikpanchangComparison profileSat 16 Sep
No institution has a recorded ruling for Chattogram.

Institutional rulings are recorded with a source address, and are never edited to agree.

The rule, as data

/rules/jitashtami · ruleset 2026.3-draft

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

“K 8 Mahalaksmi vrata samapana (current at moonrise), Jitastami (pradosa), Jimutavahana puja” Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 103.

The same rule, elsewhere

Twelve places, west to east. Local clock times.

PlaceAṣṭamīSunset 16thCoveredSunset 17thCoveredRuled
Los Angeles04:51 → 04:3718:5794 min18:560 min16 Sep
Chicago06:51 → 06:3718:5793 min18:560 min16 Sep
Jersey City07:51 → 07:3719:0393 min19:010 min16 Sep
Port of Spain07:51 → 07:3718:0695 min18:050 min16 Sep
London12:51 → 12:3719:1292 min19:090 min16 Sep
Durban13:51 → 13:3717:4996 min17:500 min16 Sep
Dubai15:51 → 15:3718:2194 min18:200 min16 Sep
Delhi17:21 → 17:0718:2594 min18:230 min16 Sep
Kolkata17:21 → 17:0717:3994 min17:380 min16 Sep
Singapore19:51 → 19:3719:0348 min19:0335 min16 Sep
Sydney21:51 → 21:3717:480 min17:4896 min17 Sep
Suva23:51 → 23:3718:020 min18:0296 min17 Sep
Profile · tradition
pac-rp@2026.1 · smarta
Rule
jitashtami@2026.3-draft
Engine · kernel
0.1.0 · de440 7eef…ea74
Boundary margin
300 s

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