Ruling · Rādhāṣṭamī · 1981

Sunday 6 September

Determinatein Puning, under the Rashtriya Panchang method. Clear of every threshold by 74 minutes.

Decide it for

PuningDelhiKolkataSingaporeSydneyJersey City

23°19′ N 116°10′ E · Asia/Shanghai · GeoNames 1802940

The two middays

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

Midday of Sunday 6 September

Taken. The only midday Aṣṭamī reaches.

madhyāhna begins 11:50  12:38 madhyāhna ends
11:0211:2611:5012:1412:3813:0213:26

48 of 48 minutes covered

Midday of Monday 7 September

Aṣṭamī is absent from madhyāhna. Not taken.

madhyāhna begins 11:49  12:37 madhyāhna ends
11:0111:2511:4912:1312:3713:0113:25

0 of 48 minutes covered

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

How it was decided

  1. 01

    Aṅga

    Aṣṭamī runs from 08:13 on Sun 6 Sep to 10:35 on Mon 7 Sep.

    1981-09-06T00:12:58Z → 1981-09-07T02:35:04Z

  2. 02

    Kāla

    Madhyāhna is 1 ghaṭikā either side of midday: 11:50–12:38 on the 6th, 11:49–12:37 on the 7th.

    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 6th and 0 of 48 on the 7th.

    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 4452 s

  5. 05

    Ruling

    Rādhāṣṭamī, Puning, 1981: Sunday 6 September.

    confidence: determinate

Say it like this

In Puning, Rādhāṣṭamī 1981 falls on Sunday 6 September. Aṣṭamī runs from 08:13 on Sun 6 Sep to 10:35 on Mon 7 Sep and covers all of madhyāhna that midday.

ahargana.org/puning/festivals/1981/radhashtami · pac-rp@2026.1

Who says what

AuthorityKindDate
Ahargaṇa, pac-rpThis rulingSun 6 Sep
Ahargaṇa, classicalDisc centre, no refractionSun 6 Sep
compat-drikpanchangComparison profileSun 6 Sep
No institution has a recorded ruling for Puning.

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 6thCoveredMadhyāhna 7thCoveredRuled
Los Angeles17:13 → 19:3512:2748 min12:270 min6 Sep
Chicago19:13 → 21:3512:2448 min12:240 min6 Sep
Jersey City20:13 → 22:3512:3048 min12:300 min6 Sep
Port of Spain20:13 → 22:3511:4048 min11:400 min6 Sep
London01:13 → 03:3512:3448 min12:340 min6 Sep
Durban02:13 → 04:3511:3048 min11:300 min6 Sep
Dubai04:13 → 06:3511:5348 min11:530 min6 Sep
Delhi05:43 → 08:0511:5548 min11:550 min6 Sep
Kolkata05:43 → 08:0511:1148 min11:100 min6 Sep
Singapore07:43 → 10:0512:0948 min12:090 min6 Sep
Sydney10:13 → 12:3511:3048 min11:3048 min6 Sep
Suva12:13 → 14:3511:4116 min11:4148 min7 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

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