Ruling · Janmāṣṭamī (Kṛṣṇa Janmāṣṭamī) · 2021

Monday 30 August

Determinatein Lucknow, under the Rashtriya Panchang method. Clear of every threshold by 18 minutes.

Decide it for

26°50′ N 80°55′ E · Asia/Kolkata · GeoNames 1264733

The two nights

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

Night of Sunday 29 August

Qualifies with 48 of 48 minutes. Not taken.

niśītha begins 23:43  00:31 niśītha ends
Aṣṭamī begins 23:25:43
22:5523:1923:4300:0700:3100:5501:19

48 of 48 minutes covered

Night of Monday 30 August

Taken. Both nights qualify; the rule takes the second.

niśītha begins 23:43  00:31 niśītha ends
22:5523:1923:4300:0700:3100:5501:19

48 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 23:26 on Sun 29 Aug to 02:00 on Tue 31 Aug.

    2021-08-29T17:55:43Z → 2021-08-30T20:30:07Z

  2. 02

    Kāla

    Niśītha is 1 ghaṭikā either side of midnight: 23:43–00:31 on the 29th, 23:43–00:31 on the 30th.

    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 29th and 48 of 48 on the 30th.

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

  4. 04

    Tie-break

    Both nights qualify. Paraviddhā: the second is taken.

    priority: paraviddha → paraviddha · margin 1052 s

  5. 05

    Ruling

    Janmāṣṭamī, Lucknow, 2021: Monday 30 August.

    confidence: determinate

Say it like this

In Lucknow, Janmāṣṭamī (Krishna Janmashtami) 2021 falls on Monday 30 August. Aṣṭamī runs from 23:26 on Sun 29 Aug to 02:00 on Tue 31 Aug and covers all of niśītha that night. It also reaches the previous night for 48 minutes; by the rule the second night is taken.

ahargana.org/lucknow/festivals/2021/janmashtami · pac-rp@2026.1

Who says what

AuthorityKindDate
Ahargaṇa, pac-rpThis rulingMon 30 Aug
Ahargaṇa, classicalDisc centre, no refractionMon 30 Aug
compat-drikpanchangComparison profileMon 30 Aug
No institution has a recorded ruling for Lucknow.

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 29thCoveredNiśītha 30thCoveredRuled
Los Angeles10:56 → 13:3000:3048 min00:290 min29 Aug
Chicago12:56 → 15:3000:2848 min00:270 min29 Aug
Jersey City13:56 → 16:3000:3348 min00:330 min29 Aug
Port of Spain13:56 → 16:3023:4348 min23:420 min29 Aug
London18:56 → 21:3000:3848 min00:370 min29 Aug
Durban19:56 → 22:3023:3248 min23:320 min29 Aug
Dubai21:56 → 00:3023:5648 min23:5535 min30 Aug
Delhi23:26 → 02:0023:5848 min23:5848 min30 Aug
Kolkata23:26 → 02:0023:1336 min23:1348 min30 Aug
Singapore01:56 → 04:3000:410 min00:4148 min30 Aug
Sydney03:56 → 06:3023:320 min23:3148 min30 Aug
Suva05:56 → 08:3023:430 min23:4348 min30 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