Ruling · Mahānavamī · 1950

Thursday 19 October

Determinatein Daqing, under the Rashtriya Panchang method. Clear of every threshold by 663 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 Wednesday 18 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

Midday of Thursday 19 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

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

How it was decided

  1. 01

    Aṅga

    Navamī runs from 23:40 on Wed 18 Oct to 22:51 on Thu 19 Oct.

    1950-10-18T15:39:58Z → 1950-10-19T14:51:20Z

  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 0 of 48 minutes on the 18th and 48 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 39752 s

  5. 05

    Ruling

    Mahānavamī, Daqing, 1950: Thursday 19 October.

    confidence: determinate

Say it like this

In Daqing, Mahānavamī 1950 falls on Thursday 19 October. Navamī runs from 23:40 on Wed 18 Oct to 22:51 on Thu 19 Oct and covers all of madhyāhna that midday.

ahargana.org/daqing/festivals/1950/mahanavami · pac-rp@2026.1

Who says what

AuthorityKindDate
Ahargaṇa, pac-rpThis rulingThu 19 Oct
Ahargaṇa, classicalDisc centre, no refractionThu 19 Oct
compat-drikpanchangComparison profileThu 19 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 18thCoveredMadhyāhna 19thCoveredRuled
Los Angeles07:40 → 06:5111:1448 min11:140 min18 Oct
Chicago09:40 → 08:5111:1248 min11:110 min18 Oct
Jersey City10:40 → 09:5111:1748 min11:170 min18 Oct
Port of Spain11:40 → 10:5111:2735 min11:270 min18 Oct
London16:40 → 15:5112:210 min12:2148 min19 Oct
Durban17:40 → 16:5111:170 min11:1748 min19 Oct
Dubai19:40 → 18:5111:400 min11:4048 min19 Oct
Delhi21:10 → 20:2111:420 min11:4248 min19 Oct
Kolkata21:10 → 20:2110:580 min10:5848 min19 Oct
Singapore23:10 → 22:2111:560 min11:5648 min19 Oct
Sydney01:40 → 00:5111:170 min11:1748 min19 Oct
Suva03:40 → 02:5111:280 min11:2848 min19 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

About Ahargaṇa