Ruling · Janmāṣṭamī (Kṛṣṇa Janmāṣṭamī) · 2087

Thursday 21 August

Determinatein Daqing, under the Rashtriya Panchang method. Clear of every threshold by 31 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 Wednesday 20 August

Aṣṭamī is absent from niśītha. Not taken.

niśītha begins 23:20  00:08 niśītha ends
Aṣṭamī begins 00:38:44
22:3222:5623:2023:4400:0800:3200:56

0 of 48 minutes covered

Night of Thursday 21 August

Taken. Aṣṭamī reaches neither night; the rule takes the second day.

niśītha begins 23:20  00:08 niśītha ends
Aṣṭamī ends 22:33:32
22:3222:5623:2023:4400:0800:3200:56

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 00:39 on Thu 21 Aug to 22:34 on Thu 21 Aug.

    2087-08-20T16:38:44Z → 2087-08-21T14:33:33Z

  2. 02

    Kāla

    Niśītha is 1 ghaṭikā either side of midnight: 23:20–00:08 on the 20th, 23:20–00:08 on the 21st.

    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 20th and 0 of 48 on the 21st.

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

  4. 04

    Tie-break

    Neither night qualifies. The rule takes the second day.

    priority: paraviddha → second-day · margin 1845 s

  5. 05

    Ruling

    Janmāṣṭamī, Daqing, 2087: Thursday 21 August.

    confidence: determinate

Say it like this

In Daqing, Janmāṣṭamī (Krishna Janmashtami) 2087 falls on Thursday 21 August. Aṣṭamī runs from 00:39 on Thu 21 Aug to 22:34 on Thu 21 Aug, and reaches niśītha on neither day.

ahargana.org/daqing/festivals/2087/janmashtami · pac-rp@2026.1

Who says what

AuthorityKindDate
Ahargaṇa, pac-rpThis rulingThu 21 Aug
Ahargaṇa, classicalDisc centre, no refractionThu 21 Aug
compat-drikpanchangComparison profileThu 21 Aug
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 20thCoveredNiśītha 21stCoveredRuled
Los Angeles09:39 → 07:3400:3348 min00:320 min20 Aug
Chicago11:39 → 09:3400:3048 min00:300 min20 Aug
Jersey City12:39 → 10:3400:3648 min00:360 min20 Aug
Port of Spain12:39 → 10:3423:4648 min23:450 min20 Aug
London17:39 → 15:3400:4048 min00:400 min20 Aug
Durban18:39 → 16:3423:3548 min23:350 min20 Aug
Dubai20:39 → 18:3423:5948 min23:580 min20 Aug
Delhi22:09 → 20:0400:0148 min00:010 min20 Aug
Kolkata22:09 → 20:0423:1648 min23:160 min20 Aug
Singapore00:39 → 22:3400:4448 min00:440 min20 Aug
Sydney02:39 → 00:3423:350 min23:3448 min21 Aug
Suva04:39 → 02:3423:460 min23:4648 min21 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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