Ruling · Mitra Saptamī · 2021

Friday 10 December

Determinatein Daqing, under the Rashtriya Panchang method. Clear of every threshold by 583 minutes.

Decide it for

DaqingDelhiKolkataSingaporeSydneyJersey City

46°35′ N 125°00′ E · Asia/Shanghai · GeoNames 2037860

The two middays

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

Midday of Thursday 9 December

Saptamī is absent from madhyāhna. Not taken.

madhyāhna begins 11:08  11:56 madhyāhna ends
10:2010:4411:0811:3211:5612:2012:44

0 of 48 minutes covered

Midday of Friday 10 December

Taken. The only midday Saptamī reaches.

madhyāhna begins 11:09  11:57 madhyāhna ends
10:2110:4511:0911:3311:5712:2112:45

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 22:25 on Thu 9 Dec to 21:40 on Fri 10 Dec.

    2021-12-09T14:24:32Z → 2021-12-10T13:39:46Z

  2. 02

    Kāla

    Madhyāhna is 1 ghaṭikā either side of midday: 11:08–11:56 on the 9th, 11:09–11:57 on the 10th.

    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 9th and 48 of 48 on the 10th.

    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 34989 s

  5. 05

    Ruling

    Mitra Saptamī, Daqing, 2021: Friday 10 December.

    confidence: determinate

Say it like this

In Daqing, Mitra Saptamī 2021 falls on Friday 10 December. Saptamī runs from 22:25 on Thu 9 Dec to 21:40 on Fri 10 Dec and covers all of madhyāhna that midday.

ahargana.org/daqing/festivals/2021/mitra-saptami · pac-rp@2026.1

Who says what

AuthorityKindDate
Ahargaṇa, pac-rpThis rulingFri 10 Dec
Ahargaṇa, classicalDisc centre, no refractionFri 10 Dec
compat-drikpanchangComparison profileFri 10 Dec
No institution has a recorded ruling for Daqing.

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 9thCoveredMadhyāhna 10thCoveredRuled
Los Angeles06:25 → 05:4011:2148 min11:220 min9 Dec
Chicago08:25 → 07:4011:1948 min11:200 min9 Dec
Jersey City09:25 → 08:4011:2548 min11:250 min9 Dec
Port of Spain10:25 → 09:4011:3548 min11:350 min9 Dec
London14:25 → 13:4011:290 min11:2948 min10 Dec
Durban16:25 → 15:4011:240 min11:2548 min10 Dec
Dubai18:25 → 17:4011:470 min11:4848 min10 Dec
Delhi19:55 → 19:1011:490 min11:5048 min10 Dec
Kolkata19:55 → 19:1011:050 min11:0548 min10 Dec
Singapore22:25 → 21:4012:330 min12:3348 min10 Dec
Sydney01:25 → 00:4012:230 min12:2448 min10 Dec
Suva02:25 → 01:4011:350 min11:3548 min10 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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