Making things harder than they need to be ?!?

Just fished this out of the spam trap. Maybe its just me, but isn't the idea that you set a deadline date and at the end of that day, the deadline happens. Obvious. Not for the SBL, so those of you who are late submitters should be careful here.

"Deadline for paper proposals [for the 2007 Annual Meeting]: March 1 (the Call closes at midnight February 28th)."

"Deadline for paper proposals [for the 2007 International Meeting]: January 15 (the Call closes at midnight January 14th)."

Why, guys? Why?