Ruling · Janmāṣṭamī · 2018

Sunday 2 September

Determinatein Daegu, under the Rashtriya Panchang method. Clear of every threshold by 16 minutes.

Decide it for

35°52′ N 128°36′ E · Asia/Seoul · GeoNames 1835329

The two nights

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

Night of Sunday 2 September

Taken. The only night Aṣṭamī reaches.

niśītha begins 00:01  00:49 niśītha ends
Aṣṭamī begins 00:17:23
23:1323:3700:0100:2500:4901:1301:37

32 of 48 minutes covered, the last 32

Night of Monday 3 September

Aṣṭamī is absent from niśītha. Not taken.

niśītha begins 00:01  00:49 niśītha ends
23:1323:3700:0100:2500:4901:1301:37

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 00:17 on Mon 3 Sep to 22:50 on Mon 3 Sep.

    2018-09-02T15:17:23Z → 2018-09-03T13:50:01Z

  2. 02

    Kāla

    Niśītha is 1 ghaṭikā either side of midnight: 00:01–00:49 on the 2nd, 00:01–00:49 on the 3rd.

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

  3. 03

    Rule

    Aṣṭamī must be present during niśītha. It covers 32 of 48 minutes on the 2nd and 0 of 48 on the 3rd.

    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 954 s

  5. 05

    Ruling

    Janmāṣṭamī, Daegu, 2018: Sunday 2 September.

    confidence: determinate

Say it like this

In Daegu, Janmāṣṭamī 2018 falls on Sunday 2 September. Aṣṭamī runs from 00:17 on Mon 3 Sep to 22:50 on Mon 3 Sep and covers 32 of 48 minutes of niśītha that night.

ahargana.org/daegu/festivals/2018/janmashtami · pac-rp@2026.1

Who says what

AuthorityKindDate
Ahargaṇa, pac-rpThis rulingSun 2 Sep
Ahargaṇa, classicalDisc centre, no refractionSun 2 Sep
compat-drikpanchangComparison profileSun 2 Sep
No institution has a recorded ruling for Daegu.

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 2ndCoveredNiśītha 3rdCoveredRuled
Los Angeles08:17 → 06:5000:2948 min00:280 min2 Sep
Chicago10:17 → 08:5000:2648 min00:260 min2 Sep
Jersey City11:17 → 09:5000:3248 min00:320 min2 Sep
Port of Spain11:17 → 09:5023:4248 min23:410 min2 Sep
London16:17 → 14:5000:3648 min00:360 min2 Sep
Durban17:17 → 15:5023:3148 min23:310 min2 Sep
Dubai19:17 → 17:5023:5448 min23:540 min2 Sep
Delhi20:47 → 19:2023:5748 min23:570 min2 Sep
Kolkata20:47 → 19:2023:1248 min23:120 min2 Sep
Singapore23:17 → 21:5000:4048 min00:400 min2 Sep
Sydney01:17 → 23:5023:310 min23:3020 min3 Sep
Suva03:17 → 01:5023:420 min23:4248 min3 Sep
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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