Ruling · Mahānavamī · 2025

Wednesday 1 October

Determinatein Baoding, under the Rashtriya Panchang method. Clear of every threshold by 485 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 Tuesday 30 September

Navamī is absent from madhyāhna. Not taken.

madhyāhna begins 11:44  12:32 madhyāhna ends
10:5611:2011:4412:0812:3212:5613:20

0 of 48 minutes covered

Midday of Wednesday 1 October

Taken. The only midday Navamī reaches.

madhyāhna begins 11:44  12:32 madhyāhna ends
10:5611:2011:4412:0812:3212:5613:20

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 20:37 on Tue 30 Sep to 21:32 on Wed 1 Oct.

    2025-09-30T12:36:37Z → 2025-10-01T13:31:41Z

  2. 02

    Kāla

    Madhyāhna is 1 ghaṭikā either side of midday: 11:44–12:32 on the 30th, 11:44–12:32 on the 1st.

    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 30th and 48 of 48 on the 1st.

    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 29085 s

  5. 05

    Ruling

    Mahānavamī, Baoding, 2025: Wednesday 1 October.

    confidence: determinate

Say it like this

In Baoding, Mahānavamī 2025 falls on Wednesday 1 October. Navamī runs from 20:37 on Tue 30 Sep to 21:32 on Wed 1 Oct and covers all of madhyāhna that midday.

ahargana.org/baoding/festivals/2025/mahanavami · pac-rp@2026.1

Who says what

AuthorityKindDate
Ahargaṇa, pac-rpThis rulingWed 1 Oct
Ahargaṇa, classicalDisc centre, no refractionWed 1 Oct
compat-drikpanchangComparison profileWed 1 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 30thCoveredMadhyāhna 1stCoveredRuled
Los Angeles05:37 → 06:3212:1948 min12:180 min30 Sep
Chicago07:37 → 08:3212:1648 min12:160 min30 Sep
Jersey City08:37 → 09:3212:2248 min12:220 min30 Sep
Port of Spain08:37 → 09:3211:3248 min11:320 min30 Sep
London13:37 → 14:3212:260 min12:2648 min1 Oct
Durban14:37 → 15:3211:220 min11:2248 min1 Oct
Dubai16:37 → 17:3211:450 min11:4448 min1 Oct
Delhi18:07 → 19:0211:470 min11:4748 min1 Oct
Kolkata18:07 → 19:0211:020 min11:0248 min1 Oct
Singapore20:37 → 21:3212:310 min12:3048 min1 Oct
Sydney22:37 → 23:3211:210 min11:2148 min1 Oct
Suva00:37 → 01:3211:330 min11:3248 min1 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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