Ruling · Mitra Saptamī · 2012

Wednesday 19 December

Determinatein Chattogram, under the Rashtriya Panchang method. Clear of every threshold by 650 minutes.

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 Tuesday 18 December

Saptamī is absent from madhyāhna. Not taken.

madhyāhna begins 11:25  12:13 madhyāhna ends
10:3711:0111:2511:4912:1312:3713:01

0 of 48 minutes covered

Midday of Wednesday 19 December

Taken. The only midday Saptamī reaches.

madhyāhna begins 11:26  12:14 madhyāhna ends
10:3811:0211:2611:5012:1412:3813:02

48 of 48 minutes covered

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

How it was decided

  1. 01

    Aṅga

    Saptamī runs from 23:12 on Tue 18 Dec to 23:04 on Wed 19 Dec.

    2012-12-18T17:11:59Z → 2012-12-19T17:03:55Z

  2. 02

    Kāla

    Madhyāhna is 1 ghaṭikā either side of midday: 11:25–12:13 on the 18th, 11:26–12:14 on the 19th.

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

  3. 03

    Rule

    Saptamī must be present during madhyāhna. It covers 0 of 48 minutes on the 18th and 48 of 48 on the 19th.

    Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 104

  4. 04

    Tie-break

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

    priority: purvaviddha → only-day · margin 39004 s

  5. 05

    Ruling

    Mitra Saptamī, Chattogram, 2012: Wednesday 19 December.

    confidence: determinate

Say it like this

In Chattogram, Mitra Saptamī 2012 falls on Wednesday 19 December. Saptamī runs from 23:12 on Tue 18 Dec to 23:04 on Wed 19 Dec and covers all of madhyāhna that midday.

ahargana.org/chattogram/festivals/2012/mitra-saptami · pac-rp@2026.1

Who says what

AuthorityKindDate
Ahargaṇa, pac-rpThis rulingWed 19 Dec
Ahargaṇa, classicalDisc centre, no refractionWed 19 Dec
compat-drikpanchangComparison profileWed 19 Dec
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/mitra-saptami · ruleset 2026.3-draft

Month
Mārgaśīrṣa, amānta
Pakṣa · aṅga
Śukla · Saptamī
Kāla
Madhyāhna
Priority
Pūrvaviddhā
Tie-break
First day
Reference
CRC 1955, p. 104

“S 7 Mitra saptami (purvaviddha).” Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 104.

The same rule, elsewhere

Twelve places, west to east. Local clock times.

PlaceSaptamīMadhyāhna 18thCoveredMadhyāhna 19thCoveredRuled
Los Angeles09:12 → 09:0411:2648 min11:260 min18 Dec
Chicago11:12 → 11:0411:2448 min11:240 min18 Dec
Jersey City12:12 → 12:0411:295 min11:3034 min18 Dec
Port of Spain13:12 → 13:0411:390 min11:3948 min19 Dec
London17:12 → 17:0411:330 min11:3448 min19 Dec
Durban19:12 → 19:0411:290 min11:2948 min19 Dec
Dubai21:12 → 21:0411:510 min11:5248 min19 Dec
Delhi22:42 → 22:3411:540 min11:5448 min19 Dec
Kolkata22:42 → 22:3411:090 min11:1048 min19 Dec
Singapore01:12 → 01:0412:370 min12:3848 min19 Dec
Sydney04:12 → 04:0412:280 min12:2848 min19 Dec
Suva06:12 → 06:0412:390 min12:3948 min19 Dec
Profile · tradition
pac-rp@2026.1 · smarta
Rule
mitra-saptami@2026.3-draft
Engine · kernel
0.1.0 · de440 7eef…ea74
Boundary margin
300 s

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