Ruling · Rathayātrā · 2057

Wednesday 4 July

Boundaryin Daqing, under the Rashtriya Panchang method. A threshold is only 1 min 25 s away. Say “contested”.

Decide it for

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

The two middays

One ghaṭī is 24 minutes. Madhyāhna is 1 ghaṭikā either side of midday.

Midday of Tuesday 3 July

Qualifies with 48 of 48 minutes. Not taken.

madhyāhna begins 11:20  12:08 madhyāhna ends
10:3210:5611:2011:4412:0812:3212:56

48 of 48 minutes covered

Midday of Wednesday 4 July

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

madhyāhna begins 11:20  12:08 madhyāhna ends
Dvitīyā ends 12:07:03
10:3210:5611:2011:4412:0812:3212:56

47 of 48 minutes covered, the first 47

Dvitīyā presentMadhyāhna, the window the rule readsThe instant the tithi begins or ends

How it was decided

  1. 01

    Aṅga

    Dvitīyā runs from 10:06 on Tue 3 Jul to 12:07 on Wed 4 Jul.

    2057-07-03T02:06:21Z → 2057-07-04T04:07:04Z

  2. 02

    Kāla

    Madhyāhna is 1 ghaṭikā either side of midday: 11:20–12:08 on the 3rd, 11:20–12:08 on the 4th.

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

  3. 03

    Rule

    Dvitīyā must be present during madhyāhna. It covers 48 of 48 minutes on the 3rd and 47 of 48 on the 4th.

    Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 102

  4. 04

    Tie-break

    Both middays qualify. Paraviddhā: the second is taken.

    priority: paraviddha → paraviddha · margin 85 s < 300 s

  5. 05

    Ruling

    Rathayātrā, Daqing, 2057: Wednesday 4 July.

    confidence: boundary (margin)

Say it like this

In Daqing, Rathayātrā 2057 falls on Wednesday 4 July. Dvitīyā runs from 10:06 on Tue 3 Jul to 12:07 on Wed 4 Jul and covers 47 of 48 minutes of madhyāhna that midday. It also reaches the previous midday for 48 minutes; by the rule the second midday is taken. It is 1 min 25 s from a threshold: treat the date as contested.

ahargana.org/daqing/festivals/2057/rathayatra · pac-rp@2026.1

Who says what

AuthorityKindDate
Ahargaṇa, pac-rpThis rulingWed 4 Jul
Ahargaṇa, classicalDisc centre, no refractionWed 4 Jul
compat-drikpanchangComparison profileWed 4 Jul
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/rathayatra · ruleset 2026.3-draft

Month
Āṣāḍha, amānta
Pakṣa · aṅga
Śukla · Dvitīyā
Kāla
Madhyāhna
Priority
Paraviddhā
Tie-break
Second day
Reference
CRC 1955, p. 102

“S 2 Rathayatra (paraviddha, special when combined with naksatra 'Pusya')” Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 102. The row calls the day special with Puṣya nakṣatra; the nakṣatra is not tested.

The same rule, elsewhere

Twelve places, west to east. Local clock times.

PlaceDvitīyāMadhyāhna 3rdCoveredMadhyāhna 4thCoveredRuled
Los Angeles19:06 → 21:0712:3348 min12:340 min3 Jul
Chicago21:06 → 23:0712:3148 min12:310 min3 Jul
Jersey City22:06 → 00:0712:3748 min12:370 min3 Jul
Port of Spain22:06 → 00:0711:4748 min11:470 min3 Jul
London03:06 → 05:0712:4148 min12:410 min3 Jul
Durban04:06 → 06:0711:3648 min11:370 min3 Jul
Dubai06:06 → 08:0711:5948 min11:590 min3 Jul
Delhi07:36 → 09:3712:0248 min12:020 min3 Jul
Kolkata07:36 → 09:3711:1748 min11:170 min3 Jul
Singapore10:06 → 12:0712:4548 min12:450 min3 Jul
Sydney12:06 → 14:0711:3617 min11:3648 min4 Jul
Suva14:06 → 16:0711:470 min11:4748 min4 Jul
Profile · tradition
pac-rp@2026.1 · smarta
Rule
rathayatra@2026.3-draft
Engine · kernel
0.1.0 · de440 7eef…ea74
Boundary margin
300 s

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