Ruling · Mahānavamī · 1958

Monday 20 October

Determinatein Baoding, under the Rashtriya Panchang method. Clear of every threshold by 58 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 20 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

Midday of Tuesday 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

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

How it was decided

  1. 01

    Aṅga

    Navamī runs from 10:07 on Mon 20 Oct to 10:40 on Tue 21 Oct.

    1958-10-20T02:07:02Z → 1958-10-21T02:40:15Z

  2. 02

    Kāla

    Madhyāhna is 1 ghaṭikā either side of midday: 11:39–12:27 on the 20th, 11:39–12:27 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 48 of 48 minutes on the 20th and 0 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 3505 s

  5. 05

    Ruling

    Mahānavamī, Baoding, 1958: Monday 20 October.

    confidence: determinate

Say it like this

In Baoding, Mahānavamī 1958 falls on Monday 20 October. Navamī runs from 10:07 on Mon 20 Oct to 10:40 on Tue 21 Oct and covers all of madhyāhna that midday.

ahargana.org/baoding/festivals/1958/mahanavami · pac-rp@2026.1

Who says what

AuthorityKindDate
Ahargaṇa, pac-rpThis rulingMon 20 Oct
Ahargaṇa, classicalDisc centre, no refractionMon 20 Oct
compat-drikpanchangComparison profileMon 20 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 20thCoveredMadhyāhna 21stCoveredRuled
Los Angeles18:07 → 18:4011:1448 min11:130 min20 Oct
Chicago21:07 → 21:4012:1148 min12:110 min20 Oct
Jersey City22:07 → 22:4012:1748 min12:170 min20 Oct
Port of Spain22:07 → 22:4011:2748 min11:270 min20 Oct
London02:07 → 02:4011:2148 min11:210 min20 Oct
Durban04:07 → 04:4011:1748 min11:170 min20 Oct
Dubai06:07 → 06:4011:4048 min11:390 min20 Oct
Delhi07:37 → 08:1011:4248 min11:420 min20 Oct
Kolkata07:37 → 08:1010:5748 min10:570 min20 Oct
Singapore09:37 → 10:1011:5648 min11:550 min20 Oct
Sydney12:07 → 12:4011:160 min11:1648 min21 Oct
Suva14:07 → 14:4011:270 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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