As a rough guide (GMT, but Finland isn't that far from the UK):
Late Saturday Evening: Japanese Preliminary Data
Late Monday Evening: Others hardware and software
Late Tuesday Evening: American hardware, and maybe software
Late Wednesday Evening: Japanese hardware, and maybe software, and American software if not already
Late Thursday Evening: Japanese software if not already
This is only my experience; not official. No official warning is usually given, unless the data will be very late.
Ubuntu. Linux for human beings.
If you are interested in trying Ubuntu or Linux in general, PM me and I will answer your questions and help you install it if you wish.