The same dates can be seen listed on donaldfagen.com with two exceptions; the May 24 - Tower Theater - Upper Darby PA is not on Donald's page. Instead it lists
UPDATE March 9: Yes, It will and it did. The May 5 gig in Memphis is now official and posted on both steelydan.com and donaldfagen.com.
That's a date that was on band member Jeff Young's homepage for a day or two together with the unofficial list of European dates.
As far as Europe goes tickets for one show; July 19 - Molde Jazz Festival in Norway, has been on sale since March 5.