Mindthegap
Just a thought : if Ryan Air put pilots on leave if they approach or slightly overstep their 900 hours (the only reasonable response to this problem) then why are they changing to a common timing of the rollover? This would mean that towards the end of March all the pilots in the company that had come to this event (which if the pilots are worked as hard as rumour here has it must be quite a number) would be on leave. This would hit them with terrible rostering problems, and might tempt them into crew duty mishandlings similar to those of which AerLingus have been accused. Alternatively it would create huge cost burdens and terrible management dilemas (having to wet lease routes perhaps or cancel all other leave for this period) that will not be good for the airline.
Either way this seems a dangerous practice as has been suggested in previous posts.