Ruling · Mitra Saptamī · 1974

Friday 20 December

Determinatein Baoding, under the Rashtriya Panchang method. Clear of every threshold by 21 minutes.

Decide it for

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 20 December

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

madhyāhna begins 11:51  12:39 madhyāhna ends
Saptamī begins 12:12:54
11:0311:2711:5112:1512:3913:0313:27

27 of 48 minutes covered, the last 27

Midday of Saturday 21 December

Qualifies with 48 of 48 minutes. Not taken.

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 12:13 on Fri 20 Dec to 14:38 on Sat 21 Dec.

    1974-12-20T04:12:55Z → 1974-12-21T06:38:13Z

  2. 02

    Kāla

    Madhyāhna is 1 ghaṭikā either side of midday: 11:51–12:39 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 27 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

    Both middays qualify. Pūrvaviddhā: the first is taken.

    priority: purvaviddha → purvaviddha · margin 1287 s

  5. 05

    Ruling

    Mitra Saptamī, Baoding, 1974: Friday 20 December.

    confidence: determinate

Say it like this

In Baoding, Mitra Saptamī 1974 falls on Friday 20 December. Saptamī runs from 12:13 on Fri 20 Dec to 14:38 on Sat 21 Dec and covers 27 of 48 minutes of madhyāhna that midday. It also reaches the next midday for 48 minutes; by the rule the first midday is taken.

ahargana.org/baoding/festivals/1974/mitra-saptami · pac-rp@2026.1

Who says what

AuthorityKindDate
Ahargaṇa, pac-rpThis rulingFri 20 Dec
Ahargaṇa, classicalDisc centre, no refractionFri 20 Dec
compat-drikpanchangComparison profileFri 20 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 Angeles20:13 → 22:3811:2748 min11:270 min20 Dec
Chicago22:13 → 00:3811:2448 min11:250 min20 Dec
Jersey City23:13 → 01:3811:3048 min11:300 min20 Dec
Port of Spain00:13 → 02:3811:4048 min11:400 min20 Dec
London04:13 → 06:3811:3448 min11:340 min20 Dec
Durban06:13 → 08:3811:2948 min11:300 min20 Dec
Dubai08:13 → 10:3811:5248 min11:530 min20 Dec
Delhi09:43 → 12:0811:5448 min11:5513 min20 Dec
Kolkata09:43 → 12:0811:1048 min11:1048 min20 Dec
Singapore11:43 → 14:0812:0848 min12:0848 min20 Dec
Sydney15:13 → 17:3812:280 min12:2948 min21 Dec
Suva16:13 → 18:3811:400 min11:4048 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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