Night of Thursday 16 August
Aṣṭamī is absent from niśītha. Not taken.
niśītha begins 23:40 00:28 niśītha ends
22:5223:1623:4000:0400:2800:5201:16
0 of 48 minutes covered
Ruling · Janmāṣṭamī · 1900
Determinatein Tehran, under the Rashtriya Panchang method. Clear of every threshold by 129 minutes.
One ghaṭī is 24 minutes. Niśītha is 1 ghaṭikā either side of midnight.
Night of Thursday 16 August
Aṣṭamī is absent from niśītha. Not taken.
0 of 48 minutes covered
Night of Friday 17 August
Taken. The only night Aṣṭamī reaches.
48 of 48 minutes covered
Aṅga
Aṣṭamī runs from 03:55 on Fri 17 Aug to 02:36 on Sat 18 Aug.
1900-08-17T00:30:12Z → 1900-08-17T23:11:10Z
Kāla
Niśītha is 1 ghaṭikā either side of midnight: 23:40–00:28 on the 16th, 23:39–00:27 on the 17th.
nishita: midnight-pm-1-ghatika · sunrise and sunset: upper limb, 31′ + 16′
Rule
Aṣṭamī must be present during niśītha. It covers 0 of 48 minutes on the 16th and 48 of 48 on the 17th.
Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 103
Tie-break
Only one night qualifies. No tie-break is needed.
priority: paraviddha → only-day · margin 7725 s
Ruling
Janmāṣṭamī, Tehran, 1900: Friday 17 August.
confidence: determinate
In Tehran, Janmāṣṭamī 1900 falls on Friday 17 August. Aṣṭamī runs from 03:55 on Fri 17 Aug to 02:36 on Sat 18 Aug and covers all of niśītha that night.
| Authority | Kind | Date |
|---|---|---|
| Ahargaṇa, pac-rp | This ruling | Fri 17 Aug |
| Ahargaṇa, classical | Disc centre, no refraction | Fri 17 Aug |
| compat-drikpanchang | Comparison profile | Fri 17 Aug |
| No institution has a recorded ruling for Tehran. | ||
Institutional rulings are recorded with a source address, and are never edited to agree.
/rules/janmashtami · ruleset 2026.3-draft
“K 8 Janmastami (madhyaratra-vyapini), if midnight is covered on two days, or not on any day, it is to be observed on the 2nd day; special when combined with naksatra 'Rohini' at midnight, more so when on Monday or Wednesday. If the combination occurs before midnight and 'Rohini' extends up to midnight, it is to be observed on that day. Gokulastami.” Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 103. The clauses on Rohiṇī nakṣatra, the Vaiṣṇava observance on the day after saptamī, and the Assam and South India reckoning in the solar month belong to other readings and are not applied.
Twelve places, west to east. Local clock times.
| Place | Aṣṭamī | Niśītha 17th | Covered | Niśītha 18th | Covered | Ruled |
|---|---|---|---|---|---|---|
| Los Angeles | 16:30 → 15:11 | 23:33 | 0 min | 23:33 | 0 min | 16 Aug |
| Chicago | 18:30 → 17:11 | 23:31 | 0 min | 23:30 | 0 min | 16 Aug |
| Jersey City | 19:30 → 18:11 | 23:36 | 0 min | 23:36 | 0 min | 16 Aug |
| Port of Spain | 20:30 → 19:11 | 23:46 | 0 min | 23:46 | 0 min | 16 Aug |
| London | 00:30 → 23:11 | 23:41 | 0 min | 23:41 | 0 min | 17 Aug |
| Durban | 02:00 → 00:41 | 23:06 | 48 min | 23:05 | 0 min | 17 Aug |
| Dubai | 04:11 → 02:52 | 23:40 | 48 min | 23:40 | 0 min | 17 Aug |
| Delhi | 05:51 → 04:32 | 23:52 | 48 min | 23:52 | 0 min | 17 Aug |
| Kolkata | 05:51 → 04:32 | 23:08 | 48 min | 23:07 | 0 min | 17 Aug |
| Singapore | 07:25 → 06:06 | 23:40 | 48 min | 23:39 | 0 min | 17 Aug |
| Sydney | 10:30 → 09:11 | 23:35 | 48 min | 23:35 | 0 min | 17 Aug |
| Suva | 12:25 → 11:06 | 23:41 | 48 min | 23:41 | 0 min | 17 Aug |