Ruling · Mahānavamī · 2064

Saturday 18 October

Determinatein Daqing, under the Rashtriya Panchang method. Clear of every threshold by 566 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 Saturday 18 October

Taken. The only midday Navamī reaches.

madhyāhna begins 11:01  11:49 madhyāhna ends
10:1310:3711:0111:2511:4912:1312:37

48 of 48 minutes covered

Midday of Sunday 19 October

Navamī is absent from madhyāhna. Not taken.

madhyāhna begins 11:01  11:49 madhyāhna ends
10:1310:3711:0111:2511:4912:1312:37

0 of 48 minutes covered

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

How it was decided

  1. 01

    Aṅga

    Navamī runs from 00:36 on Sat 18 Oct to 01:35 on Sun 19 Oct.

    2064-10-17T16:35:32Z → 2064-10-18T17:34:44Z

  2. 02

    Kāla

    Madhyāhna is 1 ghaṭikā either side of midday: 11:01–11:49 on the 18th, 11:01–11:49 on the 19th.

    madhyahna: midday-pm-1-ghatika · sunrise and sunset: upper limb, 31′ + 16′

  3. 03

    Rule

    Navamī must be present during madhyāhna. It covers 48 of 48 minutes on the 18th and 0 of 48 on the 19th.

    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 33954 s

  5. 05

    Ruling

    Mahānavamī, Daqing, 2064: Saturday 18 October.

    confidence: determinate

Say it like this

In Daqing, Mahānavamī 2064 falls on Saturday 18 October. Navamī runs from 00:36 on Sat 18 Oct to 01:35 on Sun 19 Oct and covers all of madhyāhna that midday.

ahargana.org/daqing/festivals/2064/mahanavami · pac-rp@2026.1

Who says what

AuthorityKindDate
Ahargaṇa, pac-rpThis rulingSat 18 Oct
Ahargaṇa, classicalDisc centre, no refractionSat 18 Oct
compat-drikpanchangComparison profileSat 18 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/mahanavami · ruleset 2026.3-draft

Month
Āśvina, amānta
Pakṣa · aṅga
Śukla · Navamī
Kāla
Madhyāhna
Priority
Pūrvaviddhā
Tie-break
First day
Reference
CRC 1955, p. 104

“S 9 Mahanavami (purvaviddha) (In Bengal it is observed as paraviddha covering one muhurta from sunrise).” Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 104. The Bengal reading (paraviddha, one muhūrta from sunrise) is not applied.

The same rule, elsewhere

Twelve places, west to east. Local clock times.

PlaceNavamīMadhyāhna 17thCoveredMadhyāhna 18thCoveredRuled
Los Angeles09:36 → 10:3512:1448 min12:140 min17 Oct
Chicago11:36 → 12:3512:1248 min12:1123 min17 Oct
Jersey City12:36 → 13:3512:1730 min12:1748 min17 Oct
Port of Spain12:36 → 13:3511:270 min11:2748 min18 Oct
London17:36 → 18:3512:210 min12:2148 min18 Oct
Durban18:36 → 19:3511:170 min11:1748 min18 Oct
Dubai20:36 → 21:3511:400 min11:4048 min18 Oct
Delhi22:06 → 23:0511:420 min11:4248 min18 Oct
Kolkata22:06 → 23:0510:580 min10:5848 min18 Oct
Singapore00:36 → 01:3512:260 min12:2648 min18 Oct
Sydney03:36 → 04:3512:170 min12:1748 min18 Oct
Suva04:36 → 05:3511:280 min11:2848 min18 Oct
Profile · tradition
pac-rp@2026.1 · smarta
Rule
mahanavami@2026.3-draft
Engine · kernel
0.1.0 · de440 7eef…ea74
Boundary margin
300 s

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