Ruling · Mitra Saptamī · 2020

Monday 21 December

Determinatein Baoding, under the Rashtriya Panchang method. Clear of every threshold by 283 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 Sunday 20 December

Saptamī is absent from madhyāhna. Not taken.

madhyāhna begins 11:52  12:40 madhyāhna ends
11:0411:2811:5212:1612:4013:0413:28

0 of 48 minutes covered

Midday of Monday 21 December

Taken. The only midday Saptamī reaches.

madhyāhna begins 11:52  12:40 madhyāhna ends
11:0411:2811:5212:1612:4013:0413:28

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 17:23 on Sun 20 Dec to 18:46 on Mon 21 Dec.

    2020-12-20T09:23:08Z → 2020-12-21T10:45:35Z

  2. 02

    Kāla

    Madhyāhna is 1 ghaṭikā either side of midday: 11:52–12:40 on the 20th, 11:52–12:40 on the 21st.

    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 20th and 48 of 48 on the 21st.

    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 17000 s

  5. 05

    Ruling

    Mitra Saptamī, Baoding, 2020: Monday 21 December.

    confidence: determinate

Say it like this

In Baoding, Mitra Saptamī 2020 falls on Monday 21 December. Saptamī runs from 17:23 on Sun 20 Dec to 18:46 on Mon 21 Dec and covers all of madhyāhna that midday.

ahargana.org/baoding/festivals/2020/mitra-saptami · pac-rp@2026.1

Who says what

AuthorityKindDate
Ahargaṇa, pac-rpThis rulingMon 21 Dec
Ahargaṇa, classicalDisc centre, no refractionMon 21 Dec
compat-drikpanchangComparison profileMon 21 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 20thCoveredMadhyāhna 21stCoveredRuled
Los Angeles01:23 → 02:4611:2748 min11:270 min20 Dec
Chicago03:23 → 04:4611:2548 min11:250 min20 Dec
Jersey City04:23 → 05:4611:3048 min11:310 min20 Dec
Port of Spain05:23 → 06:4611:4048 min11:400 min20 Dec
London09:23 → 10:4611:3448 min11:350 min20 Dec
Durban11:23 → 12:4611:3048 min11:3048 min20 Dec
Dubai13:23 → 14:4611:520 min11:5348 min21 Dec
Delhi14:53 → 16:1611:550 min11:5548 min21 Dec
Kolkata14:53 → 16:1611:100 min11:1148 min21 Dec
Singapore17:23 → 18:4612:380 min12:3948 min21 Dec
Sydney20:23 → 21:4612:290 min12:2948 min21 Dec
Suva22:23 → 23:4612:400 min12:4048 min21 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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