Ruling · Rādhāṣṭamī · 2023

Saturday 23 September

Determinatein Ujjain, under the Rashtriya Panchang method. Clear of every threshold by 23 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 Friday 22 September

Aṣṭamī is absent from madhyāhna. Not taken.

madhyāhna begins 11:56  12:44 madhyāhna ends
11:0811:3211:5612:2012:4413:0813:32

0 of 48 minutes covered

Midday of Saturday 23 September

Taken. The only midday Aṣṭamī reaches.

madhyāhna begins 11:55  12:43 madhyāhna ends
Aṣṭamī ends 12:18:16
11:0711:3111:5512:1912:4313:0713:31

23 of 48 minutes covered, the first 23

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

How it was decided

  1. 01

    Aṅga

    Aṣṭamī runs from 13:36 on Fri 22 Sep to 12:18 on Sat 23 Sep.

    2023-09-22T08:05:50Z → 2023-09-23T06:48:16Z

  2. 02

    Kāla

    Madhyāhna is 1 ghaṭikā either side of midday: 11:56–12:44 on the 22nd, 11:55–12:43 on the 23rd.

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

  3. 03

    Rule

    Aṣṭamī must be present during madhyāhna. It covers 0 of 48 minutes on the 22nd and 23 of 48 on the 23rd.

    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 1380 s

  5. 05

    Ruling

    Rādhāṣṭamī, Ujjain, 2023: Saturday 23 September.

    confidence: determinate

Say it like this

In Ujjain, Rādhāṣṭamī 2023 falls on Saturday 23 September. Aṣṭamī runs from 13:36 on Fri 22 Sep to 12:18 on Sat 23 Sep and covers 23 of 48 minutes of madhyāhna that midday.

ahargana.org/ujjain/festivals/2023/radhashtami · pac-rp@2026.1

Who says what

AuthorityKindDate
Ahargaṇa, pac-rpThis rulingSat 23 Sep
Ahargaṇa, classicalDisc centre, no refractionSat 23 Sep
compat-drikpanchangComparison profileSat 23 Sep
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/radhashtami · ruleset 2026.3-draft

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

“S 8 Durvastami (purvaviddha — S 8 of saura Bhadra except Bengal), Mahalaksmi vratarambha, Radhastami (madhyahna vyapini)” Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 103.

The same rule, elsewhere

Twelve places, west to east. Local clock times.

PlaceAṣṭamīMadhyāhna 22ndCoveredMadhyāhna 23rdCoveredRuled
Los Angeles01:06 → 23:4812:2148 min12:210 min22 Sep
Chicago03:06 → 01:4812:1948 min12:190 min22 Sep
Jersey City04:06 → 02:4812:2548 min12:240 min22 Sep
Port of Spain04:06 → 02:4811:3548 min11:340 min22 Sep
London09:06 → 07:4812:2948 min12:280 min22 Sep
Durban10:06 → 08:4811:2548 min11:250 min22 Sep
Dubai12:06 → 10:4811:4730 min11:470 min22 Sep
Delhi13:36 → 12:1811:500 min11:4929 min23 Sep
Kolkata13:36 → 12:1811:050 min11:0548 min23 Sep
Singapore16:06 → 14:4812:340 min12:3348 min23 Sep
Sydney18:06 → 16:4811:240 min11:2448 min23 Sep
Suva20:06 → 18:4811:350 min11:3548 min23 Sep
Profile · tradition
pac-rp@2026.1 · smarta
Rule
radhashtami@2026.3-draft
Engine · kernel
0.1.0 · de440 7eef…ea74
Boundary margin
300 s