Ruling · Mitra Saptamī · 2026

Wednesday 16 December

Determinatein Kolkata, under the Rashtriya Panchang method. Clear of every threshold by 564 minutes.

Decide it for

DelhiKolkataSingaporeSydneyJersey City

22°34′ N 88°22′ E · Asia/Kolkata · GeoNames 1275004

The two middays

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

Midday of Tuesday 15 December

Saptamī is absent from madhyāhna. Not taken.

madhyāhna begins 11:08  11:56 madhyāhna ends
10:2010:4411:0811:3211:5612:2012:44

0 of 48 minutes covered

Midday of Wednesday 16 December

Taken. The only midday Saptamī reaches.

madhyāhna begins 11:08  11:56 madhyāhna ends
10:2010:4411:0811:3211:5612:2012:44

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 21:20 on Tue 15 Dec to 22:46 on Wed 16 Dec.

    2026-12-15T15:49:54Z → 2026-12-16T17:16:21Z

  2. 02

    Kāla

    Madhyāhna is 1 ghaṭikā either side of midday: 11:08–11:56 on the 15th, 11:08–11:56 on the 16th.

    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 15th and 48 of 48 on the 16th.

    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 33862 s

  5. 05

    Ruling

    Mitra Saptamī, Kolkata, 2026: Wednesday 16 December.

    confidence: determinate

Say it like this

In Kolkata, Mitra Saptamī 2026 falls on Wednesday 16 December. Saptamī runs from 21:20 on Tue 15 Dec to 22:46 on Wed 16 Dec and covers all of madhyāhna that midday.

ahargana.org/kolkata/festivals/2026/mitra-saptami · pac-rp@2026.1

Who says what

AuthorityKindDate
Ahargaṇa, pac-rpThis rulingWed 16 Dec
Ahargaṇa, classicalDisc centre, no refractionWed 16 Dec
compat-drikpanchangComparison profileWed 16 Dec
No institution has a recorded ruling for Kolkata.

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 15thCoveredMadhyāhna 16thCoveredRuled
Los Angeles07:50 → 09:1611:2448 min11:250 min15 Dec
Chicago09:50 → 11:1611:2248 min11:220 min15 Dec
Jersey City10:50 → 12:1611:2748 min11:2848 min15 Dec
Port of Spain11:50 → 13:1611:3735 min11:3848 min15 Dec
London15:50 → 17:1611:320 min11:3248 min16 Dec
Durban17:50 → 19:1611:270 min11:2748 min16 Dec
Dubai19:50 → 21:1611:500 min11:5048 min16 Dec
Delhi21:20 → 22:4611:520 min11:5348 min16 Dec
Kolkata21:20 → 22:4611:080 min11:0848 min16 Dec
Singapore23:50 → 01:1612:360 min12:3648 min16 Dec
Sydney02:50 → 04:1612:260 min12:2748 min16 Dec
Suva03:50 → 05:1611:370 min11:3848 min16 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