Ruling · Mitra Saptamī · 2091

Sunday 16 December

Boundaryin Baoding, under the Rashtriya Panchang method. A threshold is only 4 min 52 s away. Say “contested”.

Decide it for

BaodingDelhiKolkataSingaporeSydneyJersey City

38°52′ N 115°28′ E · Asia/Shanghai · GeoNames 1816971

The two middays

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

Midday of Sunday 16 December

Taken. Both middays qualify; the rule takes the first.

madhyāhna begins 11:50  12:38 madhyāhna ends
Saptamī begins 11:41:02
11:0211:2611:5012:1412:3813:0213:26

48 of 48 minutes covered

Midday of Monday 17 December

Qualifies with 48 of 48 minutes. Not taken.

madhyāhna begins 11:50  12:38 madhyāhna ends
Saptamī ends 12:43:11
11:0211:2611:5012:1412:3813:0213:26

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 11:41 on Sun 16 Dec to 12:43 on Mon 17 Dec.

    2091-12-16T03:41:02Z → 2091-12-17T04:43:12Z

  2. 02

    Kāla

    Madhyāhna is 1 ghaṭikā either side of midday: 11:50–12:38 on the 16th, 11:50–12:38 on the 17th.

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

  3. 03

    Rule

    Saptamī must be present during madhyāhna. It covers 48 of 48 minutes on the 16th and 48 of 48 on the 17th.

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

  4. 04

    Tie-break

    Both middays qualify. Pūrvaviddhā: the first is taken.

    priority: purvaviddha → purvaviddha · margin 292 s < 300 s

  5. 05

    Ruling

    Mitra Saptamī, Baoding, 2091: Sunday 16 December.

    confidence: boundary (margin)

Say it like this

In Baoding, Mitra Saptamī 2091 falls on Sunday 16 December. Saptamī runs from 11:41 on Sun 16 Dec to 12:43 on Mon 17 Dec and covers all of madhyāhna that midday. It also reaches the next midday for 48 minutes; by the rule the first midday is taken. It is 4 min 52 s from a threshold: treat the date as contested.

ahargana.org/baoding/festivals/2091/mitra-saptami · pac-rp@2026.1

Who says what

AuthorityKindDate
Ahargaṇa, pac-rpThis rulingSun 16 Dec
Ahargaṇa, classicalDisc centre, no refractionSun 16 Dec
compat-drikpanchangComparison profileSun 16 Dec
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/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 16thCoveredMadhyāhna 17thCoveredRuled
Los Angeles19:41 → 20:4311:2548 min11:250 min16 Dec
Chicago21:41 → 22:4311:2348 min11:230 min16 Dec
Jersey City22:41 → 23:4311:2848 min11:290 min16 Dec
Port of Spain23:41 → 00:4311:3848 min11:390 min16 Dec
London03:41 → 04:4311:3248 min11:330 min16 Dec
Durban05:41 → 06:4311:2848 min11:280 min16 Dec
Dubai07:41 → 08:4311:5148 min11:510 min16 Dec
Delhi09:11 → 10:1311:5348 min11:530 min16 Dec
Kolkata09:11 → 10:1311:0848 min11:090 min16 Dec
Singapore11:41 → 12:4312:3648 min12:376 min16 Dec
Sydney14:41 → 15:4312:270 min12:2748 min17 Dec
Suva15:41 → 16:4311:380 min11:3848 min17 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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