Ruling · Janmāṣṭamī · 1940

Monday 26 August

Boundaryin Daqing, under the Rashtriya Panchang method. A threshold is only 0 min 31 s away. Say “contested”.

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 Sunday 25 August

Qualifies with 48 of 48 minutes. Not taken.

niśītha begins 00:18  01:06 niśītha ends
Aṣṭamī begins 23:48:56
23:3023:5400:1800:4201:0601:3001:54

48 of 48 minutes covered

Night of Monday 26 August

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

niśītha begins 00:18  01:06 niśītha ends
Aṣṭamī ends 01:05:31
23:3023:5400:1800:4201:0601:3001:54

47 of 48 minutes covered, the first 47

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

How it was decided

  1. 01

    Aṅga

    Aṣṭamī runs from 23:49 on Sun 25 Aug to 01:06 on Tue 27 Aug.

    1940-08-25T14:48:57Z → 1940-08-26T16:05:31Z

  2. 02

    Kāla

    Niśītha is 1 ghaṭikā either side of midnight: 00:18–01:06 on the 25th, 00:18–01:06 on the 26th.

    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 25th and 47 of 48 on the 26th.

    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 31 s < 300 s

  5. 05

    Ruling

    Janmāṣṭamī, Daqing, 1940: Monday 26 August.

    confidence: boundary (margin)

Say it like this

In Daqing, Janmāṣṭamī 1940 falls on Monday 26 August. Aṣṭamī runs from 23:49 on Sun 25 Aug to 01:06 on Tue 27 Aug and covers 47 of 48 minutes of niśītha that night. It also reaches the previous night for 48 minutes; by the rule the second night is taken. It is 0 min 31 s from a threshold: treat the date as contested.

ahargana.org/daqing/festivals/1940/janmashtami · pac-rp@2026.1

Who says what

AuthorityKindDate
Ahargaṇa, pac-rpThis rulingMon 26 Aug
Ahargaṇa, classicalDisc centre, no refractionMon 26 Aug
compat-drikpanchangComparison profileMon 26 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 25thCoveredNiśītha 26thCoveredRuled
Los Angeles06:49 → 08:0623:3148 min23:310 min25 Aug
Chicago09:49 → 11:0600:2948 min00:280 min25 Aug
Jersey City10:49 → 12:0600:3448 min00:340 min25 Aug
Port of Spain10:49 → 12:0623:4448 min23:440 min25 Aug
London15:49 → 17:0600:3948 min00:380 min25 Aug
Durban16:49 → 18:0623:3448 min23:330 min25 Aug
Dubai18:49 → 20:0623:5748 min23:570 min25 Aug
Delhi20:19 → 21:3623:5948 min23:590 min25 Aug
Kolkata20:19 → 21:3623:1548 min23:140 min25 Aug
Singapore22:09 → 23:2600:0348 min00:020 min25 Aug
Sydney00:49 → 02:0623:330 min23:3348 min26 Aug
Suva02:49 → 04:0623:440 min23:4448 min26 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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