Ruling · Rādhāṣṭamī · 1972

Saturday 16 September

Determinatein Puning, under the Rashtriya Panchang method. Clear of every threshold by 91 minutes.

Decide it for

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 Friday 15 September

Aṣṭamī is absent from madhyāhna. Not taken.

madhyāhna begins 11:46  12:34 madhyāhna ends
10:5811:2211:4612:1012:3412:5813:22

0 of 48 minutes covered

Midday of Saturday 16 September

Taken. The only midday Aṣṭamī reaches.

madhyāhna begins 11:46  12:34 madhyāhna ends
10:5811:2211:4612:1012:3412:5813:22

48 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 14:05 on Fri 15 Sep to 16:15 on Sat 16 Sep.

    1972-09-15T06:05:07Z → 1972-09-16T08:14:33Z

  2. 02

    Kāla

    Madhyāhna is 1 ghaṭikā either side of midday: 11:46–12:34 on the 15th, 11:46–12:34 on the 16th.

    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 15th and 48 of 48 on the 16th.

    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 5443 s

  5. 05

    Ruling

    Rādhāṣṭamī, Puning, 1972: Saturday 16 September.

    confidence: determinate

Say it like this

In Puning, Rādhāṣṭamī 1972 falls on Saturday 16 September. Aṣṭamī runs from 14:05 on Fri 15 Sep to 16:15 on Sat 16 Sep and covers all of madhyāhna that midday.

ahargana.org/puning/festivals/1972/radhashtami · pac-rp@2026.1

Who says what

AuthorityKindDate
Ahargaṇa, pac-rpThis rulingSat 16 Sep
Ahargaṇa, classicalDisc centre, no refractionSat 16 Sep
compat-drikpanchangComparison profileSat 16 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 15thCoveredMadhyāhna 16thCoveredRuled
Los Angeles23:05 → 01:1512:2448 min12:230 min15 Sep
Chicago01:05 → 03:1512:2148 min12:210 min15 Sep
Jersey City02:05 → 04:1512:2748 min12:270 min15 Sep
Port of Spain02:05 → 04:1511:3748 min11:370 min15 Sep
London07:05 → 09:1512:3148 min12:310 min15 Sep
Durban08:05 → 10:1511:2748 min11:270 min15 Sep
Dubai10:05 → 12:1511:5048 min11:4925 min15 Sep
Delhi11:35 → 13:4511:5248 min11:5248 min15 Sep
Kolkata11:35 → 13:4511:0820 min11:0748 min16 Sep
Singapore13:35 → 15:4512:060 min12:0548 min16 Sep
Sydney16:05 → 18:1511:270 min11:2648 min16 Sep
Suva18:05 → 20:1511:380 min11:3748 min16 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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