Ruling · Śrī Pañcamī · 1920

Monday 26 January

Boundaryin Chattogram, under the Rashtriya Panchang method. A threshold is only 4 min 39 s away. Say “contested”.

Decide it for

ChattogramDelhiKolkataSingaporeSydneyJersey City

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

The two middays

One ghaṭī is 24 minutes. Madhyāhna is 1 ghaṭikā either side of midday.

Midday of Sunday 25 January

Pañcamī is absent from madhyāhna. Not taken.

madhyāhna begins 11:34  12:22 madhyāhna ends
Pañcamī begins 12:59:42
10:4611:1011:3411:5812:2212:4613:10

0 of 48 minutes covered

Midday of Monday 26 January

Taken. The only midday Pañcamī reaches.

madhyāhna begins 11:34  12:22 madhyāhna ends
Pañcamī ends 12:27:11
10:4611:1011:3411:5812:2212:4613:10

48 of 48 minutes covered

Pañcamī presentMadhyāhna, the window the rule readsThe instant the tithi begins or ends

How it was decided

  1. 01

    Aṅga

    Pañcamī runs from 12:59 on Sun 25 Jan to 12:27 on Mon 26 Jan.

    1920-01-25T07:06:22Z → 1920-01-26T06:33:51Z

  2. 02

    Kāla

    Madhyāhna is 1 ghaṭikā either side of midday: 11:34–12:22 on the 25th, 11:34–12:22 on the 26th.

    madhyahna: midday-pm-1-ghatika · sunrise and sunset: upper limb, 31′ + 16′

  3. 03

    Rule

    Pañcamī must be present during madhyāhna. It covers 0 of 48 minutes on the 25th and 48 of 48 on the 26th.

    Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 105

  4. 04

    Tie-break

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

    priority: purvaviddha → only-day · margin 279 s < 300 s

  5. 05

    Ruling

    Śrī Pañcamī, Chattogram, 1920: Monday 26 January.

    confidence: boundary (margin)

Say it like this

In Chattogram, Śrī Pañcamī 1920 falls on Monday 26 January. Pañcamī runs from 12:59 on Sun 25 Jan to 12:27 on Mon 26 Jan and covers all of madhyāhna that midday. It is 4 min 39 s from a threshold: treat the date as contested.

ahargana.org/chattogram/festivals/1920/shri-panchami · pac-rp@2026.1

Who says what

AuthorityKindDate
Ahargaṇa, pac-rpThis rulingMon 26 Jan
Ahargaṇa, classicalDisc centre, no refractionMon 26 Jan
compat-drikpanchangComparison profileSun 25 Jan
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/shri-panchami · ruleset 2026.3-draft

Month
Māgha, amānta
Pakṣa · aṅga
Śukla · Pañcamī
Kāla
Madhyāhna
Priority
Pūrvaviddhā
Tie-break
First day
Reference
CRC 1955, p. 105

“S 5 Sri Pancami (purvaviddha), Sarasvati puja (Bengal), Vasanta pancami, Madana pancami.” Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 105.

The same rule, elsewhere

Twelve places, west to east. Local clock times.

PlacePañcamīMadhyāhna 25thCoveredMadhyāhna 26thCoveredRuled
Los Angeles23:06 → 22:3411:4148 min11:420 min25 Jan
Chicago01:06 → 00:3411:3948 min11:390 min25 Jan
Jersey City02:06 → 01:3411:4548 min11:450 min25 Jan
Port of Spain03:06 → 02:3411:5448 min11:550 min25 Jan
London07:06 → 06:3411:4948 min11:490 min25 Jan
Durban09:06 → 08:3411:4448 min11:440 min25 Jan
Dubai11:06 → 10:3412:0748 min12:070 min25 Jan
Delhi12:36 → 12:0412:0921 min12:100 min25 Jan
Kolkata12:36 → 12:0411:250 min11:2539 min26 Jan
Singapore14:06 → 13:3411:530 min11:5348 min26 Jan
Sydney17:06 → 16:3411:430 min11:4348 min26 Jan
Suva19:06 → 18:3411:540 min11:5548 min26 Jan
Profile · tradition
pac-rp@2026.1 · smarta
Rule
shri-panchami@2026.3-draft
Engine · kernel
0.1.0 · de440 7eef…ea74
Boundary margin
300 s

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