Ruling · Durgā Saptamī · 1900

Monday 1 October

Determinatein Daqing, under the Rashtriya Panchang method. Clear of every threshold by 613 minutes.

Decide it for

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

The two mornings

One ghaṭī is 24 minutes. The first muhūrta after sunrise is 1st of 15 day muhūrtas.

Morning of Sunday 30 September

Saptamī is absent from the first muhūrta after sunrise. Not taken.

sunrise 05:41  06:28 one muhūrta on
04:5305:1705:4106:0506:2906:5307:17

0 of 47 minutes covered

Morning of Monday 1 October

Taken. The only morning Saptamī reaches.

sunrise 05:43  06:30 one muhūrta on
04:5505:1905:4306:0706:3106:5507:19

47 of 47 minutes covered

Saptamī presentThe first muhūrta after sunrise, the window the rule readsThe instant the tithi begins or ends

How it was decided

  1. 01

    Aṅga

    Saptamī runs from 16:41 on Sun 30 Sep to 17:15 on Mon 1 Oct.

    1900-09-30T08:35:57Z → 1900-10-01T09:10:24Z

  2. 02

    Kāla

    The first muhūrta after sunrise is 1st of 15 day muhūrtas: 05:41–06:28 on the 30th, 05:43–06:30 on the 1st.

    udaya-1: day-muhurta-1-1 · sunrise and sunset: upper limb, 31′ + 16′

  3. 03

    Rule

    Saptamī must hold through the first muhūrta after sunrise. It covers 0 of 47 minutes on the 30th and 47 of 47 on the 1st.

    Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 104

  4. 04

    Tie-break

    Only one morning qualifies. No tie-break is needed.

    priority: paraviddha → only-day · margin 36753 s

  5. 05

    Ruling

    Durgā Saptamī, Daqing, 1900: Monday 1 October.

    confidence: determinate

Say it like this

In Daqing, Durgā Saptamī 1900 falls on Monday 1 October. Saptamī runs from 16:41 on Sun 30 Sep to 17:15 on Mon 1 Oct and covers all of the first muhūrta after sunrise that morning.

ahargana.org/daqing/festivals/1900/durga-saptami · pac-rp@2026.1

Who says what

AuthorityKindDate
Ahargaṇa, pac-rpThis rulingMon 1 Oct
Ahargaṇa, classicalDisc centre, no refractionMon 1 Oct
compat-drikpanchangComparison profileMon 1 Oct
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/durga-saptami · ruleset 2026.3-draft

Month
Āśvina, amānta
Pakṣa · aṅga
Śukla · Saptamī
Kāla
The first muhūrta after sunrise
Priority
Paraviddhā
Tie-break
Second day
Reference
CRC 1955, p. 104

“S 7 Durga saptami (paraviddha) — covering one muhurta from sunrise” Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 104.

The same rule, elsewhere

Twelve places, west to east. Local clock times.

PlaceSaptamīSunrise 30thCoveredSunrise 1stCoveredRuled
Los Angeles00:36 → 01:1005:4747 min05:470 min30 Sep
Chicago02:36 → 03:1005:4647 min05:470 min30 Sep
Jersey City03:36 → 04:1005:5247 min05:530 min30 Sep
Port of Spain04:36 → 05:1005:5548 min05:550 min30 Sep
London08:36 → 09:1005:590 min06:0147 min1 Oct
Durban10:06 → 10:4005:070 min05:0549 min1 Oct
Dubai12:17 → 12:5105:510 min05:5248 min1 Oct
Delhi13:57 → 14:3106:040 min06:0548 min1 Oct
Kolkata13:57 → 14:3105:190 min05:1948 min1 Oct
Singapore15:31 → 16:0505:470 min05:4748 min1 Oct
Sydney18:36 → 19:1005:350 min05:3450 min1 Oct
Suva20:31 → 21:0505:450 min05:4449 min1 Oct
Profile · tradition
pac-rp@2026.1 · smarta
Rule
durga-saptami@2026.3-draft
Engine · kernel
0.1.0 · de440 7eef…ea74
Boundary margin
300 s

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