Ruling · Janmāṣṭamī · 1900

Friday 17 August

Determinatein Luanda, under the Rashtriya Panchang method. Clear of every threshold by 24 minutes.

Decide it for

LuandaDelhiKolkataSingaporeSydneyJersey City

8°50′ S 13°14′ E · Africa/Luanda · GeoNames 2240449

The two nights

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.

niśītha begins 23:00  23:48 niśītha ends
22:1222:3623:0023:2423:4800:1200:36

0 of 48 minutes covered

Night of Friday 17 August

Taken. The only night Aṣṭamī reaches.

niśītha begins 23:00  23:48 niśītha ends
Aṣṭamī ends 23:24:45
22:1222:3623:0023:2423:4800:1200:36

24 of 48 minutes covered, the first 24

Aṣṭamī presentNiśītha, the window the rule readsThe instant the tithi begins or ends

How it was decided

  1. 01

    Aṅga

    Aṣṭamī runs from 00:43 on Fri 17 Aug to 23:24 on Fri 17 Aug.

    1900-08-17T00:30:12Z → 1900-08-17T23:11:10Z

  2. 02

    Kāla

    Niśītha is 1 ghaṭikā either side of midnight: 23:00–23:48 on the 16th, 23:00–23:48 on the 17th.

    nishita: midnight-pm-1-ghatika · sunrise and sunset: upper limb, 31′ + 16′

  3. 03

    Rule

    Aṣṭamī must be present during niśītha. It covers 0 of 48 minutes on the 16th and 24 of 48 on the 17th.

    Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 103

  4. 04

    Tie-break

    Only one night qualifies. No tie-break is needed.

    priority: paraviddha → only-day · margin 1422 s

  5. 05

    Ruling

    Janmāṣṭamī, Luanda, 1900: Friday 17 August.

    confidence: determinate

Say it like this

In Luanda, Janmāṣṭamī 1900 falls on Friday 17 August. Aṣṭamī runs from 00:43 on Fri 17 Aug to 23:24 on Fri 17 Aug and covers 24 of 48 minutes of niśītha that night.

ahargana.org/luanda/festivals/1900/janmashtami · pac-rp@2026.1

Who says what

AuthorityKindDate
Ahargaṇa, pac-rpThis rulingFri 17 Aug
Ahargaṇa, classicalDisc centre, no refractionFri 17 Aug
compat-drikpanchangComparison profileFri 17 Aug
No institution has a recorded ruling for Luanda.

Institutional rulings are recorded with a source address, and are never edited to agree.

The rule, as data

/rules/janmashtami · ruleset 2026.3-draft

Month
Śrāvaṇa, amānta
Pakṣa · aṅga
Kṛṣṇa · Aṣṭamī
Kāla
Niśītha
Priority
Paraviddhā
Tie-break
Second day
Reference
CRC 1955, p. 103

“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.

The same rule, elsewhere

Twelve places, west to east. Local clock times.

PlaceAṣṭamīNiśītha 17thCoveredNiśītha 18thCoveredRuled
Los Angeles16:30 → 15:1123:330 min23:330 min16 Aug
Chicago18:30 → 17:1123:310 min23:300 min16 Aug
Jersey City19:30 → 18:1123:360 min23:360 min16 Aug
Port of Spain20:30 → 19:1123:460 min23:460 min16 Aug
London00:30 → 23:1123:410 min23:410 min17 Aug
Durban02:00 → 00:4123:0648 min23:050 min17 Aug
Dubai04:11 → 02:5223:4048 min23:400 min17 Aug
Delhi05:51 → 04:3223:5248 min23:520 min17 Aug
Kolkata05:51 → 04:3223:0848 min23:070 min17 Aug
Singapore07:25 → 06:0623:4048 min23:390 min17 Aug
Sydney10:30 → 09:1123:3548 min23:350 min17 Aug
Suva12:25 → 11:0623:4148 min23:410 min17 Aug
Profile · tradition
pac-rp@2026.1 · smarta
Rule
janmashtami@2026.3-draft
Engine · kernel
0.1.0 · de440 7eef…ea74
Boundary margin
300 s

About Ahargaṇa