Ruling · Gaṇeśa Caturthī · 2018

Thursday 13 September

Determinatein Baoding, under the Rashtriya Panchang method. Clear of every threshold by 284 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 Wednesday 12 September

Caturthī is absent from madhyāhna. Not taken.

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

0 of 48 minutes covered

Midday of Thursday 13 September

Taken. The only midday Caturthī reaches.

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

48 of 48 minutes covered

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

How it was decided

  1. 01

    Aṅga

    Caturthī runs from 18:37 on Wed 12 Sep to 17:22 on Thu 13 Sep.

    2018-09-12T10:37:29Z → 2018-09-13T09:21:55Z

  2. 02

    Kāla

    Madhyāhna is 1 ghaṭikā either side of midday: 11:50–12:38 on the 12th, 11:50–12:38 on the 13th.

    madhyahna: midday-pm-1-ghatika · sunrise and sunset: upper limb, 31′ + 16′

  3. 03

    Rule

    Caturthī must be present during madhyāhna. It covers 0 of 48 minutes on the 12th and 48 of 48 on the 13th.

    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: purvaviddha → only-day · margin 17043 s

  5. 05

    Ruling

    Gaṇeśa Caturthī, Baoding, 2018: Thursday 13 September.

    confidence: determinate

Say it like this

In Baoding, Gaṇeśa Caturthī 2018 falls on Thursday 13 September. Caturthī runs from 18:37 on Wed 12 Sep to 17:22 on Thu 13 Sep and covers all of madhyāhna that midday.

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

Who says what

AuthorityKindDate
Ahargaṇa, pac-rpThis rulingThu 13 Sep
Ahargaṇa, classicalDisc centre, no refractionThu 13 Sep
compat-drikpanchangComparison profileThu 13 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/ganesha-chaturthi · ruleset 2026.3-draft

Month
Bhādrapada, amānta
Pakṣa · aṅga
Śukla · Caturthī
Kāla
Madhyāhna
Priority
Pūrvaviddhā
Tie-break
First day
Reference
CRC 1955, p. 103

“S 4 Varada caturthi (purvaviddha, madhyahnavyapini), Samvatsari parva (Jain-caturthi paksa), Saubhagya caturthi (Bengal), Ganesa caturthi (madhyahna vyapini and purvaviddha)” Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 103.

The same rule, elsewhere

Twelve places, west to east. Local clock times.

PlaceCaturthīMadhyāhna 12thCoveredMadhyāhna 13thCoveredRuled
Los Angeles03:37 → 02:2212:2548 min12:250 min12 Sep
Chicago05:37 → 04:2212:2248 min12:220 min12 Sep
Jersey City06:37 → 05:2212:2848 min12:280 min12 Sep
Port of Spain06:37 → 05:2211:3848 min11:380 min12 Sep
London11:37 → 10:2212:3248 min12:320 min12 Sep
Durban12:37 → 11:2211:280 min11:280 min13 Sep
Dubai14:37 → 13:2211:510 min11:5148 min13 Sep
Delhi16:07 → 14:5211:530 min11:5348 min13 Sep
Kolkata16:07 → 14:5211:090 min11:0848 min13 Sep
Singapore18:37 → 17:2212:370 min12:3748 min13 Sep
Sydney20:37 → 19:2211:280 min11:2848 min13 Sep
Suva22:37 → 21:2211:390 min11:3948 min13 Sep
Profile · tradition
pac-rp@2026.1 · smarta
Rule
ganesha-chaturthi@2026.3-draft
Engine · kernel
0.1.0 · de440 7eef…ea74
Boundary margin
300 s

About Ahargaṇa