Ruling · Ṛṣi Tarpaṇa · 1925

Tuesday 4 August

Determinatein Baoding, under the Rashtriya Panchang method. Clear of every threshold by 431 minutes.

Decide it for

38°52′ N 115°28′ E · Asia/Shanghai · GeoNames 1816971

The two middays

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

Midday of Monday 3 August

Pūrṇimā is absent from madhyāhna. Not taken.

madhyāhna begins 12:00  12:48 madhyāhna ends
11:1211:3612:0012:2412:4813:1213:36

0 of 48 minutes covered

Midday of Tuesday 4 August

Taken. The only midday Pūrṇimā reaches.

madhyāhna begins 12:00  12:48 madhyāhna ends
11:1211:3612:0012:2412:4813:1213:36

48 of 48 minutes covered

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

How it was decided

  1. 01

    Aṅga

    Pūrṇimā runs from 23:42 on Mon 3 Aug to 19:59 on Tue 4 Aug.

    1925-08-03T15:42:05Z → 1925-08-04T11:58:50Z

  2. 02

    Kāla

    Madhyāhna is 1 ghaṭikā either side of midday: 12:00–12:48 on the 3rd, 12:00–12:48 on the 4th.

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

  3. 03

    Rule

    Pūrṇimā must be present during madhyāhna. It covers 0 of 48 minutes on the 3rd and 48 of 48 on the 4th.

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

  4. 04

    Tie-break

    Only one midday qualifies. No tie-break is needed.

    priority: unstated → only-day · margin 25859 s

  5. 05

    Ruling

    Ṛṣi Tarpaṇa, Baoding, 1925: Tuesday 4 August.

    confidence: determinate

Say it like this

In Baoding, Ṛṣi Tarpaṇa 1925 falls on Tuesday 4 August. Pūrṇimā runs from 23:42 on Mon 3 Aug to 19:59 on Tue 4 Aug and covers all of madhyāhna that midday.

ahargana.org/baoding/festivals/1925/rishi-tarpana · pac-rp@2026.1

Who says what

AuthorityKindDate
Ahargaṇa, pac-rpThis rulingTue 4 Aug
Ahargaṇa, classicalDisc centre, no refractionTue 4 Aug
compat-drikpanchangComparison profileTue 4 Aug
No institution has a recorded ruling for Baoding.

Institutional rulings are recorded with a source address, and are never edited to agree.

The rule, as data

/rules/rishi-tarpana · ruleset 2026.3-draft

Month
Śrāvaṇa, amānta
Pakṣa · aṅga
Śukla · Pūrṇimā
Kāla
Madhyāhna
Priority
Unstated
Tie-break
Longer coverage, as a boundary
Reference
CRC 1955, p. 103

“S 15 Rakhi purnima, Naroli purnima (Cocoanut day), Raksa Bandhana (in the second half of purnima), Rsi tarpana (madhyahna vyapini), Hayagriva utpatti, Jhulanayatra samapana” Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 103.

The same rule, elsewhere

Twelve places, west to east. Local clock times.

PlacePūrṇimāMadhyāhna 3rdCoveredMadhyāhna 4thCoveredRuled
Los Angeles07:42 → 03:5911:3548 min11:350 min3 Aug
Chicago10:42 → 06:5912:3248 min12:320 min3 Aug
Jersey City11:42 → 07:5912:3848 min12:380 min3 Aug
Port of Spain11:42 → 07:5911:4848 min11:480 min3 Aug
London16:42 → 12:5912:420 min12:4217 min4 Aug
Durban17:42 → 13:5911:380 min11:3848 min4 Aug
Dubai19:42 → 15:5912:010 min12:0148 min4 Aug
Delhi21:12 → 17:2912:030 min12:0348 min4 Aug
Kolkata21:12 → 17:2911:180 min11:1848 min4 Aug
Singapore22:42 → 18:5911:470 min11:4748 min4 Aug
Sydney01:42 → 21:5911:370 min11:3748 min4 Aug
Suva03:42 → 23:5911:480 min11:4848 min4 Aug
Profile · tradition
pac-rp@2026.1 · smarta
Rule
rishi-tarpana@2026.3-draft
Engine · kernel
0.1.0 · de440 7eef…ea74
Boundary margin
300 s

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