Ruling · Janmāṣṭamī · 2042

Saturday 6 September

Determinatein Daqing, under the Rashtriya Panchang method. Clear of every threshold by 560 minutes.

Decide it for

46°35′ N 125°00′ E · Asia/Shanghai · GeoNames 2037860

The two nights

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

Night of Saturday 6 September

Taken. The only night Aṣṭamī reaches.

niśītha begins 23:15  00:03 niśītha ends
22:2722:5123:1523:3900:0300:2700:51

48 of 48 minutes covered

Night of Sunday 7 September

Aṣṭamī is absent from niśītha. Not taken.

niśītha begins 23:14  00:02 niśītha ends
22:2622:5023:1423:3800:0200:2600:50

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 13:55 on Sat 6 Sep to 12:31 on Sun 7 Sep.

    2042-09-06T05:54:48Z → 2042-09-07T04:31:05Z

  2. 02

    Kāla

    Niśītha is 1 ghaṭikā either side of midnight: 23:15–00:03 on the 6th, 23:14–00:02 on the 7th.

    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 6th and 0 of 48 on the 7th.

    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 33592 s

  5. 05

    Ruling

    Janmāṣṭamī, Daqing, 2042: Saturday 6 September.

    confidence: determinate

Say it like this

In Daqing, Janmāṣṭamī 2042 falls on Saturday 6 September. Aṣṭamī runs from 13:55 on Sat 6 Sep to 12:31 on Sun 7 Sep and covers all of niśītha that night.

ahargana.org/daqing/festivals/2042/janmashtami · pac-rp@2026.1

Who says what

AuthorityKindDate
Ahargaṇa, pac-rpThis rulingSat 6 Sep
Ahargaṇa, classicalDisc centre, no refractionSat 6 Sep
compat-drikpanchangComparison profileSat 6 Sep
No institution has a recorded ruling for Daqing.

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 6thCoveredNiśītha 7thCoveredRuled
Los Angeles22:55 → 21:3100:270 min00:270 min5 Sep
Chicago00:55 → 23:3100:250 min00:250 min5 Sep
Jersey City01:55 → 00:3100:310 min00:300 min6 Sep
Port of Spain01:55 → 00:3123:4048 min23:400 min6 Sep
London06:55 → 05:3100:3548 min00:350 min6 Sep
Durban07:55 → 06:3123:3048 min23:300 min6 Sep
Dubai09:55 → 08:3123:5348 min23:530 min6 Sep
Delhi11:25 → 10:0123:5648 min23:550 min6 Sep
Kolkata11:25 → 10:0123:1148 min23:110 min6 Sep
Singapore13:55 → 12:3100:3948 min00:390 min6 Sep
Sydney15:55 → 14:3123:2948 min23:290 min6 Sep
Suva17:55 → 16:3123:4148 min23:400 min6 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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