Midday of Tuesday 28 September
Taken. The only midday Navamī reaches.
madhyāhna begins 11:19 12:07 madhyāhna ends
Navamī begins 11:21:41
10:3110:5511:1911:4312:0712:3112:55
46 of 48 minutes covered, the last 46
Ruling · Mahānavamī · 1971
Boundaryin Chattogram, under the Rashtriya Panchang method. A threshold is only 2 min 15 s away. Say “contested”.
Decide it for
22°20′ N 91°50′ E · Asia/Dhaka · GeoNames 1205733
One ghaṭī is 24 minutes. Madhyāhna is 1 ghaṭikā either side of midday.
Midday of Tuesday 28 September
Taken. The only midday Navamī reaches.
46 of 48 minutes covered, the last 46
Midday of Wednesday 29 September
Navamī is absent from madhyāhna. Not taken.
0 of 48 minutes covered
Aṅga
Navamī runs from 11:22 on Tue 28 Sep to 10:56 on Wed 29 Sep.
1971-09-28T05:21:41Z → 1971-09-29T04:55:43Z
Kāla
Madhyāhna is 1 ghaṭikā either side of midday: 11:19–12:07 on the 28th, 11:19–12:07 on the 29th.
madhyahna: midday-pm-1-ghatika · sunrise and sunset: upper limb, 31′ + 16′
Rule
Navamī must be present during madhyāhna. It covers 46 of 48 minutes on the 28th and 0 of 48 on the 29th.
Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 104
Tie-break
Only one midday qualifies. No tie-break is needed.
priority: purvaviddha → only-day · margin 135 s < 300 s
Ruling
Mahānavamī, Chattogram, 1971: Tuesday 28 September.
confidence: boundary (margin)
In Chattogram, Mahānavamī 1971 falls on Tuesday 28 September. Navamī runs from 11:22 on Tue 28 Sep to 10:56 on Wed 29 Sep and covers 46 of 48 minutes of madhyāhna that midday. It is 2 min 15 s from a threshold: treat the date as contested.
| Authority | Kind | Date |
|---|---|---|
| Ahargaṇa, pac-rp | This ruling | Tue 28 Sep |
| Ahargaṇa, classical | Disc centre, no refraction | Tue 28 Sep |
| compat-drikpanchang | Comparison profile | Tue 28 Sep |
| No institution has a recorded ruling for Chattogram. | ||
Institutional rulings are recorded with a source address, and are never edited to agree.
/rules/mahanavami · ruleset 2026.3-draft
“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.
Twelve places, west to east. Local clock times.
| Place | Navamī | Madhyāhna 28th | Covered | Madhyāhna 29th | Covered | Ruled |
|---|---|---|---|---|---|---|
| Los Angeles | 22:22 → 21:56 | 12:19 | 48 min | 12:19 | 0 min | 28 Sep |
| Chicago | 00:22 → 23:56 | 12:17 | 48 min | 12:17 | 0 min | 28 Sep |
| Jersey City | 01:22 → 00:56 | 12:23 | 48 min | 12:22 | 0 min | 28 Sep |
| Port of Spain | 01:22 → 00:56 | 11:33 | 48 min | 11:32 | 0 min | 28 Sep |
| London | 06:22 → 05:56 | 12:27 | 48 min | 12:27 | 0 min | 28 Sep |
| Durban | 07:22 → 06:56 | 11:23 | 48 min | 11:23 | 0 min | 28 Sep |
| Dubai | 09:22 → 08:56 | 11:45 | 48 min | 11:45 | 0 min | 28 Sep |
| Delhi | 10:52 → 10:26 | 11:48 | 48 min | 11:47 | 0 min | 28 Sep |
| Kolkata | 10:52 → 10:26 | 11:03 | 48 min | 11:03 | 0 min | 28 Sep |
| Singapore | 12:52 → 12:26 | 12:02 | 0 min | 12:01 | 25 min | 29 Sep |
| Sydney | 15:22 → 14:56 | 11:22 | 0 min | 11:22 | 48 min | 29 Sep |
| Suva | 17:22 → 16:56 | 11:33 | 0 min | 11:33 | 48 min | 29 Sep |