I have to agree, for the same reason Sunday is much more convienient for me, but that also means the school kids only have less than one day to play before they have to go to school Monday, and electronics aren't allowed in any school here. So by releasing Saturday they would give the school kids an extra day to play but then again the Pokemon release is usually only one day a year so its not like I can't go out of my way to get the game for one Saturday, and besides its only 5-10 min out of my way.
While I love the worldwide release, I hate this trend of releasing on Saturday.
Australia normally releases games on Thursday or Friday, but lately Nintendo have been releasing games on Saturdays in Australia, even if it's not a worldwide simultaneous release. It's so strange and pointless.