"Ryanair have confirmed that its website www.ryanair.com will close for a 10 hour period from 19:00hrs Wednesday 24th June 2009 until 05:00hrs Thursday (25th June) due to an essential upgrade maintenance.
In order to avoid any inconvenience, web check-in passengers travelling on Thursday 25th must ensure that they have checked in online before 18:00hrs Wednesday 24th June. Ryanair’s website will not be available for any passenger bookings or other passenger services from 19:00hrs due to these upgrade works."