Ruling · Mahānavamī · 1975

Monday 13 October

Determinatein Baoding, under the Rashtriya Panchang method. Clear of every threshold by 555 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 Sunday 12 October

Navamī is absent from madhyāhna. Not taken.

madhyāhna begins 11:41  12:29 madhyāhna ends
10:5311:1711:4112:0512:2912:5313:17

0 of 48 minutes covered

Midday of Monday 13 October

Taken. The only midday Navamī reaches.

madhyāhna begins 11:40  12:28 madhyāhna ends
10:5211:1611:4012:0412:2812:5213:16

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 21:44 on Sun 12 Oct to 23:09 on Mon 13 Oct.

    1975-10-12T13:43:48Z → 1975-10-13T15:08:59Z

  2. 02

    Kāla

    Madhyāhna is 1 ghaṭikā either side of midday: 11:41–12:29 on the 12th, 11:40–12:28 on the 13th.

    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 12th and 48 of 48 on the 13th.

    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 33312 s

  5. 05

    Ruling

    Mahānavamī, Baoding, 1975: Monday 13 October.

    confidence: determinate

Say it like this

In Baoding, Mahānavamī 1975 falls on Monday 13 October. Navamī runs from 21:44 on Sun 12 Oct to 23:09 on Mon 13 Oct and covers all of madhyāhna that midday.

ahargana.org/baoding/festivals/1975/mahanavami · pac-rp@2026.1

Who says what

AuthorityKindDate
Ahargaṇa, pac-rpThis rulingMon 13 Oct
Ahargaṇa, classicalDisc centre, no refractionMon 13 Oct
compat-drikpanchangComparison profileMon 13 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 12thCoveredMadhyāhna 13thCoveredRuled
Los Angeles06:44 → 08:0912:1548 min12:150 min12 Oct
Chicago08:44 → 10:0912:1348 min12:130 min12 Oct
Jersey City09:44 → 11:0912:1948 min12:180 min12 Oct
Port of Spain09:44 → 11:0911:2948 min11:280 min12 Oct
London14:44 → 16:0912:230 min12:2248 min13 Oct
Durban15:44 → 17:0911:190 min11:1948 min13 Oct
Dubai17:44 → 19:0911:410 min11:4148 min13 Oct
Delhi19:14 → 20:3911:440 min11:4348 min13 Oct
Kolkata19:14 → 20:3910:590 min10:5948 min13 Oct
Singapore21:14 → 22:3911:570 min11:5748 min13 Oct
Sydney23:44 → 01:0911:180 min11:1848 min13 Oct
Suva01:44 → 03:0911:290 min11:2948 min13 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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