Ruling · Janmāṣṭamī (Kṛṣṇa Janmāṣṭamī) · 2017

Monday 14 August

Determinatein Tehran, under the Rashtriya Panchang method. Clear of every threshold by 359 minutes.

Decide it for

35°42′ N 51°25′ E · Asia/Tehran · GeoNames 112931

The two nights

One ghaṭī is 24 minutes. Niśītha is 1 ghaṭikā either side of midnight.

Night of Monday 14 August

Taken. The only night Aṣṭamī reaches.

niśītha begins 00:45  01:33 niśītha ends
23:5700:2100:4501:0901:3301:5702:21

48 of 48 minutes covered

Night of Tuesday 15 August

Aṣṭamī is absent from niśītha. Not taken.

niśītha begins 00:45  01:33 niśītha ends
23:5700:2100:4501:0901:3301:5702:21

0 of 48 minutes covered

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

How it was decided

  1. 01

    Aṅga

    Aṣṭamī runs from 18:46 on Mon 14 Aug to 16:40 on Tue 15 Aug.

    2017-08-14T14:15:44Z → 2017-08-15T12:09:53Z

  2. 02

    Kāla

    Niśītha is 1 ghaṭikā either side of midnight: 00:45–01:33 on the 14th, 00:45–01:33 on the 15th.

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

  3. 03

    Rule

    Aṣṭamī must be present during niśītha. It covers 48 of 48 minutes on the 14th and 0 of 48 on the 15th.

    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 21561 s

  5. 05

    Ruling

    Janmāṣṭamī, Tehran, 2017: Monday 14 August.

    confidence: determinate

Say it like this

In Tehran, Janmāṣṭamī (Krishna Janmashtami) 2017 falls on Monday 14 August. Aṣṭamī runs from 18:46 on Mon 14 Aug to 16:40 on Tue 15 Aug and covers all of niśītha that night.

ahargana.org/tehran/festivals/2017/janmashtami · pac-rp@2026.1

Who says what

AuthorityKindDate
Ahargaṇa, pac-rpThis rulingMon 14 Aug
Ahargaṇa, classicalDisc centre, no refractionMon 14 Aug
compat-drikpanchangComparison profileMon 14 Aug
No institution has a recorded ruling for Tehran.

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 14thCoveredNiśītha 15thCoveredRuled
Los Angeles07:16 → 05:1000:3448 min00:330 min14 Aug
Chicago09:16 → 07:1000:3148 min00:310 min14 Aug
Jersey City10:16 → 08:1000:3748 min00:370 min14 Aug
Port of Spain10:16 → 08:1023:4748 min23:460 min14 Aug
London15:16 → 13:1000:4148 min00:410 min14 Aug
Durban16:16 → 14:1023:3648 min23:360 min14 Aug
Dubai18:16 → 16:1023:5948 min23:590 min14 Aug
Delhi19:46 → 17:4000:0248 min00:020 min14 Aug
Kolkata19:46 → 17:4023:1748 min23:170 min14 Aug
Singapore22:16 → 20:1000:4548 min00:450 min14 Aug
Sydney00:16 → 22:1023:368 min23:350 min14 Aug
Suva02:16 → 00:1023:470 min23:4723 min15 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

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