Ruling · Rādhāṣṭamī · 2016

Friday 9 September

Determinatein Cairo, under the Rashtriya Panchang method. Clear of every threshold by 526 minutes.

Decide it for

CairoDelhiKolkataSingaporeSydneyJersey City

30°04′ N 31°15′ E · Africa/Cairo · GeoNames 360630

The two middays

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

Midday of Friday 9 September

Taken. The only midday Aṣṭamī reaches.

madhyāhna begins 11:28  12:16 madhyāhna ends
10:4011:0411:2811:5212:1612:4013:04

48 of 48 minutes covered

Midday of Saturday 10 September

Aṣṭamī is absent from madhyāhna. Not taken.

madhyāhna begins 11:28  12:16 madhyāhna ends
10:4011:0411:2811:5212:1612:4013:04

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 00:49 on Fri 9 Sep to 02:41 on Sat 10 Sep.

    2016-09-08T22:49:07Z → 2016-09-10T00:41:16Z

  2. 02

    Kāla

    Madhyāhna is 1 ghaṭikā either side of midday: 11:28–12:16 on the 9th, 11:28–12:16 on the 10th.

    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 9th and 0 of 48 on the 10th.

    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 31581 s

  5. 05

    Ruling

    Rādhāṣṭamī, Cairo, 2016: Friday 9 September.

    confidence: determinate

Say it like this

In Cairo, Rādhāṣṭamī 2016 falls on Friday 9 September. Aṣṭamī runs from 00:49 on Fri 9 Sep to 02:41 on Sat 10 Sep and covers all of madhyāhna that midday.

ahargana.org/cairo/festivals/2016/radhashtami · pac-rp@2026.1

Who says what

AuthorityKindDate
Ahargaṇa, pac-rpThis rulingFri 9 Sep
Ahargaṇa, classicalDisc centre, no refractionFri 9 Sep
compat-drikpanchangComparison profileFri 9 Sep
No institution has a recorded ruling for Cairo.

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 8thCoveredMadhyāhna 10thCoveredRuled
Los Angeles15:49 → 17:4112:260 min12:250 min9 Sep
Chicago17:49 → 19:4112:240 min12:230 min9 Sep
Jersey City18:49 → 20:4112:290 min12:290 min9 Sep
Port of Spain18:49 → 20:4111:390 min11:390 min9 Sep
London23:49 → 01:4112:330 min12:330 min9 Sep
Durban00:49 → 02:4111:300 min11:290 min9 Sep
Dubai02:49 → 04:4111:520 min11:510 min9 Sep
Delhi04:19 → 06:1111:540 min11:540 min9 Sep
Kolkata04:19 → 06:1111:100 min11:090 min9 Sep
Singapore06:49 → 08:4112:380 min12:380 min9 Sep
Sydney08:49 → 10:4111:290 min11:280 min9 Sep
Suva10:49 → 12:4111:400 min11:3948 min9 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