Ruling · Rādhāṣṭamī · 2018

Monday 17 September

Determinatein Baoding, under the Rashtriya Panchang method. Clear of every threshold by 348 minutes.

Decide it for

BaodingDelhiKolkataSingaporeSydneyJersey City

38°52′ N 115°28′ E · Asia/Shanghai · GeoNames 1816971

The two middays

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

Midday of Sunday 16 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

Midday of Monday 17 September

Taken. The only midday Aṣṭamī reaches.

madhyāhna begins 11:48  12:36 madhyāhna ends
11:0011:2411:4812:1212:3613:0013:24

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 18:24 on Sun 16 Sep to 20:15 on Mon 17 Sep.

    2018-09-16T10:24:25Z → 2018-09-17T12:14:32Z

  2. 02

    Kāla

    Madhyāhna is 1 ghaṭikā either side of midday: 11:49–12:37 on the 16th, 11:48–12:36 on the 17th.

    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 16th and 48 of 48 on the 17th.

    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 20857 s

  5. 05

    Ruling

    Rādhāṣṭamī, Baoding, 2018: Monday 17 September.

    confidence: determinate

Say it like this

In Baoding, Rādhāṣṭamī 2018 falls on Monday 17 September. Aṣṭamī runs from 18:24 on Sun 16 Sep to 20:15 on Mon 17 Sep and covers all of madhyāhna that midday.

ahargana.org/baoding/festivals/2018/radhashtami · pac-rp@2026.1

Who says what

AuthorityKindDate
Ahargaṇa, pac-rpThis rulingMon 17 Sep
Ahargaṇa, classicalDisc centre, no refractionMon 17 Sep
compat-drikpanchangComparison profileMon 17 Sep
No institution has a recorded ruling for Baoding.

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 16thCoveredMadhyāhna 17thCoveredRuled
Los Angeles03:24 → 05:1512:2348 min12:230 min16 Sep
Chicago05:24 → 07:1512:2148 min12:210 min16 Sep
Jersey City06:24 → 08:1512:2748 min12:260 min16 Sep
Port of Spain06:24 → 08:1511:3748 min11:360 min16 Sep
London11:24 → 13:1512:3148 min12:3044 min16 Sep
Durban12:24 → 14:1511:270 min11:2748 min17 Sep
Dubai14:24 → 16:1511:490 min11:4948 min17 Sep
Delhi15:54 → 17:4511:520 min11:5148 min17 Sep
Kolkata15:54 → 17:4511:070 min11:0748 min17 Sep
Singapore18:24 → 20:1512:360 min12:3548 min17 Sep
Sydney20:24 → 22:1511:260 min11:2648 min17 Sep
Suva22:24 → 00:1511:370 min11:3748 min17 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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