Ruling · Mitra Saptamī · 1917

Thursday 20 December

Determinatein Baoding, under the Rashtriya Panchang method. Clear of every threshold by 388 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 Thursday 20 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

Midday of Friday 21 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

Saptamī presentMadhyāhna, the window the rule readsThe instant the tithi begins or ends

How it was decided

  1. 01

    Aṅga

    Saptamī runs from 05:23 on Thu 20 Dec to 03:11 on Fri 21 Dec.

    1917-12-19T21:23:24Z → 1917-12-20T19:10:47Z

  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 48 of 48 minutes on the 20th and 0 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 23287 s

  5. 05

    Ruling

    Mitra Saptamī, Baoding, 1917: Thursday 20 December.

    confidence: determinate

Say it like this

In Baoding, Mitra Saptamī 1917 falls on Thursday 20 December. Saptamī runs from 05:23 on Thu 20 Dec to 03:11 on Fri 21 Dec and covers all of madhyāhna that midday.

ahargana.org/baoding/festivals/1917/mitra-saptami · pac-rp@2026.1

Who says what

AuthorityKindDate
Ahargaṇa, pac-rpThis rulingThu 20 Dec
Ahargaṇa, classicalDisc centre, no refractionThu 20 Dec
compat-drikpanchangComparison profileThu 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 19thCoveredMadhyāhna 20thCoveredRuled
Los Angeles13:23 → 11:1111:260 min11:270 min20 Dec
Chicago15:23 → 13:1111:240 min11:2448 min20 Dec
Jersey City16:23 → 14:1111:290 min11:3048 min20 Dec
Port of Spain17:23 → 15:1111:390 min11:4048 min20 Dec
London21:23 → 19:1111:340 min11:3448 min20 Dec
Durban23:23 → 21:1111:290 min11:2948 min20 Dec
Dubai01:04 → 22:5211:330 min11:3348 min20 Dec
Delhi02:53 → 00:4111:540 min11:5448 min20 Dec
Kolkata02:53 → 00:4111:090 min11:1048 min20 Dec
Singapore04:23 → 02:1111:370 min11:3848 min20 Dec
Sydney07:23 → 05:1111:280 min11:2948 min20 Dec
Suva09:23 → 07:1111:390 min11:4048 min20 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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