I have imported the australia holidays calendar and it puts Easter Monday as Saturday 13th April 2013, when it is actually Monday (go figure) 1st of April. Microsoft April fools joke perhaps?
Interestingly it correctly places good friday on 29th March.
So looking forward it also has East Monday incorrect for future years. Listed as Sunday 13th April 2014,. Monday 13th April 2015....
So it's obviously been setup to be April 13 every year. I wonder how long this has been an issue?