Ruling · Mahānavamī · 1977

Thursday 20 October

Determinatein Baoding, under the Rashtriya Panchang method. Clear of every threshold by 225 minutes.

Decide it for

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 Thursday 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 Friday 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 07:53 on Thu 20 Oct to 06:29 on Fri 21 Oct.

    1977-10-19T23:53:26Z → 1977-10-20T22:28:36Z

  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 13520 s

  5. 05

    Ruling

    Mahānavamī, Baoding, 1977: Thursday 20 October.

    confidence: determinate

Say it like this

In Baoding, Mahānavamī 1977 falls on Thursday 20 October. Navamī runs from 07:53 on Thu 20 Oct to 06:29 on Fri 21 Oct and covers all of madhyāhna that midday.

ahargana.org/baoding/festivals/1977/mahanavami · pac-rp@2026.1

Who says what

AuthorityKindDate
Ahargaṇa, pac-rpThis rulingThu 20 Oct
Ahargaṇa, classicalDisc centre, no refractionThu 20 Oct
compat-drikpanchangComparison profileThu 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 19thCoveredMadhyāhna 20thCoveredRuled
Los Angeles16:53 → 15:2912:140 min12:1448 min20 Oct
Chicago18:53 → 17:2912:110 min12:1148 min20 Oct
Jersey City19:53 → 18:2912:170 min12:1748 min20 Oct
Port of Spain19:53 → 18:2911:270 min11:2748 min20 Oct
London00:53 → 23:2912:210 min12:2148 min20 Oct
Durban01:53 → 00:2911:170 min11:1748 min20 Oct
Dubai03:53 → 02:2911:400 min11:3948 min20 Oct
Delhi05:23 → 03:5911:420 min11:4248 min20 Oct
Kolkata05:23 → 03:5910:570 min10:5748 min20 Oct
Singapore07:23 → 05:5911:560 min11:5548 min20 Oct
Sydney09:53 → 08:2911:170 min11:1648 min20 Oct
Suva11:53 → 10:2911:280 min11:2722 min20 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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