Optimal date for DrupalCon Paris?

Some holidays, events, and activities that could conflict with the con, or that could complement it.

Holidays

• 31/08/2009: end of school holidays (BE)
• 16/08/2009: end of school holidays (part of NL)
• 23/08/2009: end of school holidays (part of NL)
• 30/08/2009: end of school holidays (part of NL)
• 02/09/2009: end of school holidays (FR)
• 06/09/2009: end of school holidays (part of NL)
• 22/08/2009 - 21/09/2009: Ramadan (islam)
• 07/09/2009: Labor Day (US)
• 18/09/2009: Rosh Hashanah (judaism)
• 27/09/2009:Yom Kippur (judaism)
• 09/10/2009: Shemini Atzeret (judaism)
• 09/10/2009: Columbus Day (US)
• 12/10/2009: Thanksgiving (Can)

Events

• 09/08/2009 - 14/09/2009: World Congress on Ergonomics 2009 (China)
• 24/08/2009 - 28/08/2009: INTERACT 2009 (Sweden)
• 08/09/2009 - 10/09/2009: DigitalIDWorld 2009(US)
• 15/09/2009 - 18/09/2009: UX Week (US)
  
• 08/10/2009 - 11/10/2009: AIGA Design Conference 2009 (US)
• 20/10/2009 - 22/10/2009: Web2.0 Summit2009 (US)

Possible matching events

• 02/09/2009 - 06/09/2009: Breast Cancer Care - Londen to Paris Bikeride (http://www.doitforcharity.com/breast-cancer-care-london-to-paris-cycle-r...)
• 07/09/2009 - 09/09/2009: IEC Broadband World Forum (Paris)
• 16/09/2009 - 20/09/2009: Alzheimer's Society - London to Paris Bikeride (http://www.alzheimers.org.uk/site/scripts/documents_info.php?categoryID=...)

Outside official holidays is preferred.
Last week of august = tourist price
first week september = business price (more expensive)