Ruling · Ṛṣi Tarpaṇa · 1908

Wednesday 12 August

Determinatein Baoding, under the Rashtriya Panchang method. Clear of every threshold by 12 minutes.

Decide it for

BaodingDelhiKolkataSingaporeSydneyJersey City

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 Tuesday 11 August

Pūrṇimā is absent from madhyāhna. Not taken.

madhyāhna begins 11:59  12:47 madhyāhna ends
11:1111:3511:5912:2312:4713:1113:35

0 of 48 minutes covered

Midday of Wednesday 12 August

Taken. The only midday Pūrṇimā reaches.

madhyāhna begins 11:59  12:47 madhyāhna ends
Pūrṇimā ends 12:58:40
11:1111:3511:5912:2312:4713:1113:35

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 16:48 on Tue 11 Aug to 12:59 on Wed 12 Aug.

    1908-08-11T08:48:13Z → 1908-08-12T04:58:40Z

  2. 02

    Kāla

    Madhyāhna is 1 ghaṭikā either side of midday: 11:59–12:47 on the 11th, 11:59–12:47 on the 12th.

    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 11th and 48 of 48 on the 12th.

    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 712 s

  5. 05

    Ruling

    Ṛṣi Tarpaṇa, Baoding, 1908: Wednesday 12 August.

    confidence: determinate

Say it like this

In Baoding, Ṛṣi Tarpaṇa 1908 falls on Wednesday 12 August. Pūrṇimā runs from 16:48 on Tue 11 Aug to 12:59 on Wed 12 Aug and covers all of madhyāhna that midday.

ahargana.org/baoding/festivals/1908/rishi-tarpana · pac-rp@2026.1

Who says what

AuthorityKindDate
Ahargaṇa, pac-rpThis rulingWed 12 Aug
Ahargaṇa, classicalDisc centre, no refractionWed 12 Aug
compat-drikpanchangComparison profileWed 12 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 11thCoveredMadhyāhna 12thCoveredRuled
Los Angeles00:48 → 20:5911:3448 min11:340 min11 Aug
Chicago02:48 → 22:5911:3148 min11:310 min11 Aug
Jersey City03:48 → 23:5911:3748 min11:370 min11 Aug
Port of Spain04:48 → 00:5911:4748 min11:470 min11 Aug
London08:48 → 04:5911:4148 min11:410 min11 Aug
Durban10:48 → 06:5911:3748 min11:370 min11 Aug
Dubai12:29 → 08:4011:410 min11:410 min12 Aug
Delhi14:18 → 10:2912:020 min12:020 min12 Aug
Kolkata14:18 → 10:2911:180 min11:170 min12 Aug
Singapore15:48 → 11:5911:460 min11:4613 min12 Aug
Sydney18:48 → 14:5911:360 min11:3648 min12 Aug
Suva20:43 → 16:5411:430 min11:4248 min12 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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