Ruling · Mitra Saptamī · 1991

Friday 13 December

Determinatein Baoding, under the Rashtriya Panchang method. Clear of every threshold by 421 minutes.

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 Friday 13 December

Taken. The only midday Saptamī reaches.

madhyāhna begins 11:48  12:36 madhyāhna ends
11:0011:2411:4812:1212:3613:0013:24

48 of 48 minutes covered

Midday of Saturday 14 December

Saptamī is absent from madhyāhna. Not taken.

madhyāhna begins 11:48  12:36 madhyāhna ends
11:0011:2411:4812:1212:3613:0013:24

0 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 02:49 on Fri 13 Dec to 04:47 on Sat 14 Dec.

    1991-12-12T18:49:11Z → 1991-12-13T20:47:11Z

  2. 02

    Kāla

    Madhyāhna is 1 ghaṭikā either side of midday: 11:48–12:36 on the 13th, 11:48–12:36 on the 14th.

    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 13th and 0 of 48 on the 14th.

    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 25274 s

  5. 05

    Ruling

    Mitra Saptamī, Baoding, 1991: Friday 13 December.

    confidence: determinate

Say it like this

In Baoding, Mitra Saptamī 1991 falls on Friday 13 December. Saptamī runs from 02:49 on Fri 13 Dec to 04:47 on Sat 14 Dec and covers all of madhyāhna that midday.

ahargana.org/baoding/festivals/1991/mitra-saptami · pac-rp@2026.1

Who says what

AuthorityKindDate
Ahargaṇa, pac-rpThis rulingFri 13 Dec
Ahargaṇa, classicalDisc centre, no refractionFri 13 Dec
compat-drikpanchangComparison profileFri 13 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 12thCoveredMadhyāhna 13thCoveredRuled
Los Angeles10:49 → 12:4711:2348 min11:2348 min12 Dec
Chicago12:49 → 14:4711:200 min11:2148 min13 Dec
Jersey City13:49 → 15:4711:260 min11:2648 min13 Dec
Port of Spain14:49 → 16:4711:360 min11:3648 min13 Dec
London18:49 → 20:4711:300 min11:3048 min13 Dec
Durban20:49 → 22:4711:250 min11:2648 min13 Dec
Dubai22:49 → 00:4711:480 min11:4948 min13 Dec
Delhi00:19 → 02:1711:500 min11:5148 min13 Dec
Kolkata00:19 → 02:1711:060 min11:0648 min13 Dec
Singapore02:49 → 04:4712:340 min12:3448 min13 Dec
Sydney05:49 → 07:4712:250 min12:2548 min13 Dec
Suva06:49 → 08:4711:360 min11:3648 min13 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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