Ruling · Mahānavamī · 1920

Thursday 21 October

Determinatein Puning, under the Rashtriya Panchang method. Clear of every threshold by 553 minutes.

Decide it for

PuningDelhiKolkataSingaporeSydneyJersey City

23°19′ N 116°10′ E · Asia/Shanghai · GeoNames 1802940

The two middays

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

Midday of Wednesday 20 October

Navamī is absent from madhyāhna. Not taken.

madhyāhna begins 11:36  12:24 madhyāhna ends
10:4811:1211:3612:0012:2412:4813:12

0 of 48 minutes covered

Midday of Thursday 21 October

Taken. The only midday Navamī reaches.

madhyāhna begins 11:36  12:24 madhyāhna ends
10:4811:1211:3612:0012:2412:4813:12

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 21:37 on Wed 20 Oct to 23:35 on Thu 21 Oct.

    1920-10-20T13:36:50Z → 1920-10-21T15:35:12Z

  2. 02

    Kāla

    Madhyāhna is 1 ghaṭikā either side of midday: 11:36–12:24 on the 20th, 11:36–12:24 on the 21st.

    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 20th and 48 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 33164 s

  5. 05

    Ruling

    Mahānavamī, Puning, 1920: Thursday 21 October.

    confidence: determinate

Say it like this

In Puning, Mahānavamī 1920 falls on Thursday 21 October. Navamī runs from 21:37 on Wed 20 Oct to 23:35 on Thu 21 Oct and covers all of madhyāhna that midday.

ahargana.org/puning/festivals/1920/mahanavami · pac-rp@2026.1

Who says what

AuthorityKindDate
Ahargaṇa, pac-rpThis rulingThu 21 Oct
Ahargaṇa, classicalDisc centre, no refractionThu 21 Oct
compat-drikpanchangComparison profileThu 21 Oct
No institution has a recorded ruling for Puning.

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 20thCoveredMadhyāhna 21stCoveredRuled
Los Angeles05:37 → 07:3511:1448 min11:130 min20 Oct
Chicago08:37 → 10:3512:1148 min12:110 min20 Oct
Jersey City09:37 → 11:3512:1748 min12:170 min20 Oct
Port of Spain09:37 → 11:3511:2748 min11:279 min20 Oct
London14:37 → 16:3512:210 min12:2148 min21 Oct
Durban15:37 → 17:3511:170 min11:1748 min21 Oct
Dubai17:37 → 19:3511:400 min11:3948 min21 Oct
Delhi19:07 → 21:0511:420 min11:4248 min21 Oct
Kolkata19:07 → 21:0510:570 min10:5748 min21 Oct
Singapore20:37 → 22:3511:260 min11:2548 min21 Oct
Sydney23:37 → 01:3511:160 min11:1648 min21 Oct
Suva01:37 → 03:3511:270 min11:2748 min21 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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