Ruling · Rādhāṣṭamī · 1937

Sunday 12 September

Boundaryin Bucharest, under the Rashtriya Panchang method. Both middays qualify and the rule does not say which to take. Say “contested”.

Decide it for

BucharestDelhiKolkataSingaporeSydneyJersey City

44°26′ N 26°06′ E · Europe/Bucharest · GeoNames 683506

The two middays

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

Midday of Sunday 12 September

Taken. Both middays qualify; the rule is silent, and this one is covered longer.

madhyāhna begins 12:48  13:36 madhyāhna ends
12:0012:2412:4813:1213:3614:0014:24

48 of 48 minutes covered

Midday of Monday 13 September

Qualifies with 24 of 48 minutes. Not taken.

madhyāhna begins 12:47  13:35 madhyāhna ends
Aṣṭamī ends 13:11:20
11:5912:2312:4713:1113:3513:5914:23

24 of 48 minutes covered, the first 24

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

How it was decided

  1. 01

    Aṅga

    Aṣṭamī runs from 10:40 on Sun 12 Sep to 13:11 on Mon 13 Sep.

    1937-09-12T07:39:43Z → 1937-09-13T10:11:21Z

  2. 02

    Kāla

    Madhyāhna is 1 ghaṭikā either side of midday: 12:48–13:36 on the 12th, 12:47–13:35 on the 13th.

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

  3. 03

    Rule

    Aṣṭamī must be present during madhyāhna. It covers 48 of 48 minutes on the 12th and 24 of 48 on the 13th.

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

  4. 04

    Tie-break

    Both middays qualify and the rule marks neither. The one covered longer is ruled, as a boundary.

    priority: unstated → greater-coverage · margin 1431 s

  5. 05

    Ruling

    Rādhāṣṭamī, Bucharest, 1937: Sunday 12 September.

    confidence: boundary (tie-break-unstated)

Say it like this

In Bucharest, Rādhāṣṭamī 1937 falls on Sunday 12 September. Aṣṭamī runs from 10:40 on Sun 12 Sep to 13:11 on Mon 13 Sep and covers all of madhyāhna that midday. It also reaches the next midday for 24 minutes; the rule does not say which to take, and the one covered longer is ruled: treat the date as contested.

ahargana.org/bucharest/festivals/1937/radhashtami · pac-rp@2026.1

Who says what

AuthorityKindDate
Ahargaṇa, pac-rpThis rulingSun 12 Sep
Ahargaṇa, classicalDisc centre, no refractionSun 12 Sep
compat-drikpanchangComparison profileSun 12 Sep
No institution has a recorded ruling for Bucharest.

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 12thCoveredMadhyāhna 13thCoveredRuled
Los Angeles23:40 → 02:1111:2548 min11:250 min12 Sep
Chicago02:40 → 05:1112:2348 min12:220 min12 Sep
Jersey City03:40 → 06:1112:2848 min12:280 min12 Sep
Port of Spain03:40 → 06:1111:3848 min11:380 min12 Sep
London08:40 → 11:1112:3248 min12:320 min12 Sep
Durban09:40 → 12:1111:2848 min11:2843 min12 Sep
Dubai11:40 → 14:1111:5148 min11:5148 min12 Sep
Delhi13:10 → 15:4111:530 min11:5348 min13 Sep
Kolkata13:10 → 15:4111:090 min11:0848 min13 Sep
Singapore15:00 → 17:3111:570 min11:5748 min13 Sep
Sydney17:40 → 20:1111:280 min11:2848 min13 Sep
Suva19:40 → 22:1111:390 min11:3948 min13 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

About Ahargaṇa