Microsoft's Major Nelson has dropped a note on his Twitter account that the Deal of the Week promotion will now roll out each Tuesday instead of Monday. The Major noted further that the weekly promotion will now run each week from Tuesday until the following Tuesday.
To help cement this drastic change in your brain, here's an example. This week's deal is Sonic the Hedgehog 4: Episode One, which will be discounted from 1200 points ($15) to 800 ($10). When will it be available? Tuesday! That's right! When will the deal expire? Next Tuesday! Oh man, you guys are good at this.