Ruling · Mahānavamī · 1999

Monday 18 October

Determinatein Baoding, under the Rashtriya Panchang method. Clear of every threshold by 17 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 Monday 18 October

Taken. Both middays qualify; the rule takes the first.

madhyāhna begins 11:39  12:27 madhyāhna ends
Navamī begins 11:55:49
10:5111:1511:3912:0312:2712:5113:15

31 of 48 minutes covered, the last 31

Midday of Tuesday 19 October

Qualifies with 48 of 48 minutes. Not taken.

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 11:56 on Mon 18 Oct to 13:18 on Tue 19 Oct.

    1999-10-18T03:55:49Z → 1999-10-19T05:17:55Z

  2. 02

    Kāla

    Madhyāhna is 1 ghaṭikā either side of midday: 11:39–12:27 on the 18th, 11:39–12:27 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 31 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

    Both middays qualify. Pūrvaviddhā: the first is taken.

    priority: purvaviddha → purvaviddha · margin 999 s

  5. 05

    Ruling

    Mahānavamī, Baoding, 1999: Monday 18 October.

    confidence: determinate

Say it like this

In Baoding, Mahānavamī 1999 falls on Monday 18 October. Navamī runs from 11:56 on Mon 18 Oct to 13:18 on Tue 19 Oct and covers 31 of 48 minutes of madhyāhna that midday. It also reaches the next midday for 48 minutes; by the rule the first midday is taken.

ahargana.org/baoding/festivals/1999/mahanavami · pac-rp@2026.1

Who says what

AuthorityKindDate
Ahargaṇa, pac-rpThis rulingMon 18 Oct
Ahargaṇa, classicalDisc centre, no refractionMon 18 Oct
compat-drikpanchangComparison profileMon 18 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 18thCoveredMadhyāhna 19thCoveredRuled
Los Angeles20:56 → 22:1812:1448 min12:140 min18 Oct
Chicago22:56 → 00:1812:1148 min12:110 min18 Oct
Jersey City23:56 → 01:1812:1748 min12:170 min18 Oct
Port of Spain23:56 → 01:1811:2748 min11:270 min18 Oct
London04:56 → 06:1812:2148 min12:210 min18 Oct
Durban05:56 → 07:1811:1748 min11:170 min18 Oct
Dubai07:56 → 09:1811:4048 min11:400 min18 Oct
Delhi09:26 → 10:4811:4248 min11:420 min18 Oct
Kolkata09:26 → 10:4810:5848 min10:570 min18 Oct
Singapore11:56 → 13:1812:2648 min12:2648 min18 Oct
Sydney13:56 → 15:1811:170 min11:1748 min19 Oct
Suva15:56 → 17:1811:280 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

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