Ruling · Mahānavamī · 2099

Thursday 22 October

Determinatein Baoding, under the Rashtriya Panchang method. Clear of every threshold by 455 minutes.

Decide it for

BaodingDelhiKolkataSingaporeSydneyJersey City

38°52′ N 115°28′ E · Asia/Shanghai · GeoNames 1816971

The two middays

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

Midday of Wednesday 21 October

Navamī is absent from madhyāhna. Not taken.

madhyāhna begins 11:39  12:27 madhyāhna ends
10:5111:1511:3912:0312:2712:5113:15

0 of 48 minutes covered

Midday of Thursday 22 October

Taken. The only midday Navamī reaches.

madhyāhna begins 11:39  12:27 madhyāhna ends
10:5111:1511:3912:0312:2712:5113:15

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 20:02 on Wed 21 Oct to 21:38 on Thu 22 Oct.

    2099-10-21T12:01:45Z → 2099-10-22T13:37:57Z

  2. 02

    Kāla

    Madhyāhna is 1 ghaṭikā either side of midday: 11:39–12:27 on the 21st, 11:39–12:27 on the 22nd.

    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 21st and 48 of 48 on the 22nd.

    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 27293 s

  5. 05

    Ruling

    Mahānavamī, Baoding, 2099: Thursday 22 October.

    confidence: determinate

Say it like this

In Baoding, Mahānavamī 2099 falls on Thursday 22 October. Navamī runs from 20:02 on Wed 21 Oct to 21:38 on Thu 22 Oct and covers all of madhyāhna that midday.

ahargana.org/baoding/festivals/2099/mahanavami · pac-rp@2026.1

Who says what

AuthorityKindDate
Ahargaṇa, pac-rpThis rulingThu 22 Oct
Ahargaṇa, classicalDisc centre, no refractionThu 22 Oct
compat-drikpanchangComparison profileThu 22 Oct
No institution has a recorded ruling for Baoding.

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 21stCoveredMadhyāhna 22ndCoveredRuled
Los Angeles05:02 → 06:3812:1448 min12:130 min21 Oct
Chicago07:02 → 08:3812:1148 min12:110 min21 Oct
Jersey City08:02 → 09:3812:1748 min12:170 min21 Oct
Port of Spain08:02 → 09:3811:2748 min11:270 min21 Oct
London13:02 → 14:3812:217 min12:2148 min21 Oct
Durban14:02 → 15:3811:170 min11:1748 min22 Oct
Dubai16:02 → 17:3811:400 min11:3948 min22 Oct
Delhi17:32 → 19:0811:420 min11:4248 min22 Oct
Kolkata17:32 → 19:0810:570 min10:5748 min22 Oct
Singapore20:02 → 21:3812:260 min12:2548 min22 Oct
Sydney23:02 → 00:3812:160 min12:1648 min22 Oct
Suva00:02 → 01:3811:270 min11:2748 min22 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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