Ruling · Rādhāṣṭamī · 2093

Sunday 30 August

Boundaryin Daqing, under the Rashtriya Panchang method. A threshold is only 4 min 46 s away. Say “contested”.

Decide it for

DaqingDelhiKolkataSingaporeSydneyJersey City

46°35′ N 125°00′ E · Asia/Shanghai · GeoNames 2037860

The two middays

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

Midday of Saturday 29 August

Aṣṭamī is absent from madhyāhna. Not taken.

madhyāhna begins 11:17  12:05 madhyāhna ends
10:2910:5311:1711:4112:0512:2912:53

0 of 48 minutes covered

Midday of Sunday 30 August

Taken. The only midday Aṣṭamī reaches.

madhyāhna begins 11:16  12:04 madhyāhna ends
Aṣṭamī ends 12:09:13
10:2810:5211:1611:4012:0412:2812:52

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 13:44 on Sat 29 Aug to 12:09 on Sun 30 Aug.

    2093-08-29T05:44:15Z → 2093-08-30T04:09:14Z

  2. 02

    Kāla

    Madhyāhna is 1 ghaṭikā either side of midday: 11:17–12:05 on the 29th, 11:16–12:04 on the 30th.

    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 29th and 48 of 48 on the 30th.

    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 286 s < 300 s

  5. 05

    Ruling

    Rādhāṣṭamī, Daqing, 2093: Sunday 30 August.

    confidence: boundary (margin)

Say it like this

In Daqing, Rādhāṣṭamī 2093 falls on Sunday 30 August. Aṣṭamī runs from 13:44 on Sat 29 Aug to 12:09 on Sun 30 Aug and covers all of madhyāhna that midday. It is 4 min 46 s from a threshold: treat the date as contested.

ahargana.org/daqing/festivals/2093/radhashtami · pac-rp@2026.1

Who says what

AuthorityKindDate
Ahargaṇa, pac-rpThis rulingSun 30 Aug
Ahargaṇa, classicalDisc centre, no refractionSun 30 Aug
compat-drikpanchangComparison profileSun 30 Aug
No institution has a recorded ruling for Daqing.

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 29thCoveredMadhyāhna 30thCoveredRuled
Los Angeles22:44 → 21:0912:3048 min12:290 min29 Aug
Chicago00:44 → 23:0912:2748 min12:270 min29 Aug
Jersey City01:44 → 00:0912:3348 min12:330 min29 Aug
Port of Spain01:44 → 00:0911:4348 min11:430 min29 Aug
London06:44 → 05:0912:3748 min12:370 min29 Aug
Durban07:44 → 06:0911:3348 min11:330 min29 Aug
Dubai09:44 → 08:0911:5648 min11:550 min29 Aug
Delhi11:14 → 09:3911:5848 min11:580 min29 Aug
Kolkata11:14 → 09:3911:1447 min11:130 min29 Aug
Singapore13:44 → 12:0912:420 min12:410 min30 Aug
Sydney15:44 → 14:0911:330 min11:3248 min30 Aug
Suva17:44 → 16:0911:440 min11:4348 min30 Aug
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