Ruling · Gaṇeśa Caturthī (Vināyaka Caturthī) · 2021

Friday 10 September

Determinatein Baoding, under the Rashtriya Panchang method. Clear of every threshold by 542 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 Friday 10 September

Taken. The only midday Caturthī reaches.

madhyāhna begins 11:51  12:39 madhyāhna ends
11:0311:2711:5112:1512:3913:0313:27

48 of 48 minutes covered

Midday of Saturday 11 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

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

How it was decided

  1. 01

    Aṅga

    Caturthī runs from 02:49 on Fri 10 Sep to 00:28 on Sat 11 Sep.

    2021-09-09T18:48:47Z → 2021-09-10T16:28:12Z

  2. 02

    Kāla

    Madhyāhna is 1 ghaṭikā either side of midday: 11:51–12:39 on the 10th, 11:50–12:38 on the 11th.

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

  3. 03

    Rule

    Caturthī must be present during madhyāhna. It covers 48 of 48 minutes on the 10th and 0 of 48 on the 11th.

    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 32523 s

  5. 05

    Ruling

    Gaṇeśa Caturthī, Baoding, 2021: Friday 10 September.

    confidence: determinate

Say it like this

In Baoding, Gaṇeśa Caturthī 2021 falls on Friday 10 September. Caturthī runs from 02:49 on Fri 10 Sep to 00:28 on Sat 11 Sep and covers all of madhyāhna that midday.

ahargana.org/baoding/festivals/2021/ganesha-chaturthi · pac-rp@2026.1

Who says what

AuthorityKindDate
Ahargaṇa, pac-rpThis rulingFri 10 Sep
Ahargaṇa, classicalDisc centre, no refractionFri 10 Sep
compat-drikpanchangComparison profileFri 10 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 9thCoveredMadhyāhna 10thCoveredRuled
Los Angeles11:49 → 09:2812:2648 min12:250 min9 Sep
Chicago13:49 → 11:2812:230 min12:230 min10 Sep
Jersey City14:49 → 12:2812:290 min12:290 min10 Sep
Port of Spain14:49 → 12:2811:390 min11:3948 min10 Sep
London19:49 → 17:2812:330 min12:3348 min10 Sep
Durban20:49 → 18:2811:290 min11:2948 min10 Sep
Dubai22:49 → 20:2811:520 min11:5248 min10 Sep
Delhi00:19 → 21:5811:540 min11:5448 min10 Sep
Kolkata00:19 → 21:5811:100 min11:0948 min10 Sep
Singapore02:49 → 00:2812:380 min12:3848 min10 Sep
Sydney04:49 → 02:2811:290 min11:2848 min10 Sep
Suva06:49 → 04:2811:400 min11:3948 min10 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