Good catch...
Norman happened on Saturday 10/1/2005
Bali happened on Saturday 12 October 2002,
then again on Saturday 10/1/2005.
However, Bali is on the other side of the international date line, which means it happened about 12 hours earlier, but does lend credance to the theory that dates are very important to these bombers?
Either that or Saturday night is alright for bombing!!! http://www.forbes.com/home/feeds/afx/2005/10/02/afx2255094.html
No, not dates...but they do want to appear "coordinated" so timing matters to them a little.