Ruling · Ṛṣi Tarpaṇa · 2026

Thursday 27 August

Determinatein Ujjain, under the Rashtriya Panchang method. Clear of every threshold by 136 minutes.

Decide it for

UjjainDelhiKolkataSingaporeSydneyJersey City

23°11′ N 75°47′ E · Asia/Kolkata · GeoNames 1253914

The two middays

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

Midday of Thursday 27 August

Taken. The only midday Pūrṇimā reaches.

madhyāhna begins 12:04  12:52 madhyāhna ends
11:1611:4012:0412:2812:5213:1613:40

48 of 48 minutes covered

Midday of Friday 28 August

Pūrṇimā is absent from madhyāhna. Not taken.

madhyāhna begins 12:04  12:52 madhyāhna ends
11:1611:4012:0412:2812:5213:1613:40

0 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 09:09 on Thu 27 Aug to 09:49 on Fri 28 Aug.

    2026-08-27T03:39:20Z → 2026-08-28T04:18:32Z

  2. 02

    Kāla

    Madhyāhna is 1 ghaṭikā either side of midday: 12:04–12:52 on the 27th, 12:04–12:52 on the 28th.

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

  3. 03

    Rule

    Pūrṇimā must be present during madhyāhna. It covers 48 of 48 minutes on the 27th and 0 of 48 on the 28th.

    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 8130 s

  5. 05

    Ruling

    Ṛṣi Tarpaṇa, Ujjain, 2026: Thursday 27 August.

    confidence: determinate

Say it like this

In Ujjain, Ṛṣi Tarpaṇa 2026 falls on Thursday 27 August. Pūrṇimā runs from 09:09 on Thu 27 Aug to 09:49 on Fri 28 Aug and covers all of madhyāhna that midday.

ahargana.org/ujjain/festivals/2026/rishi-tarpana · pac-rp@2026.1

Who says what

AuthorityKindDate
Ahargaṇa, pac-rpThis rulingThu 27 Aug
Ahargaṇa, classicalDisc centre, no refractionThu 27 Aug
compat-drikpanchangComparison profileThu 27 Aug
No institution has a recorded ruling for Ujjain.

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 27thCoveredMadhyāhna 28thCoveredRuled
Los Angeles20:39 → 21:1912:3048 min12:300 min27 Aug
Chicago22:39 → 23:1912:2848 min12:270 min27 Aug
Jersey City23:39 → 00:1912:3348 min12:330 min27 Aug
Port of Spain23:39 → 00:1911:4348 min11:430 min27 Aug
London04:39 → 05:1912:3748 min12:370 min27 Aug
Durban05:39 → 06:1911:3448 min11:330 min27 Aug
Dubai07:39 → 08:1911:5648 min11:560 min27 Aug
Delhi09:09 → 09:4911:5848 min11:580 min27 Aug
Kolkata09:09 → 09:4911:1448 min11:140 min27 Aug
Singapore11:39 → 12:1912:4248 min12:420 min27 Aug
Sydney13:39 → 14:1911:330 min11:3348 min28 Aug
Suva15:39 → 16:1911:440 min11:4448 min28 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