Fightin' Phils Game Time Question

For the last few years I've been wanting to attend a Fightin' Phils game, and I thought a Sunday day trip would be great. When I go to Aberdeen, for instance, a drive through the country is wonderful.

Reading doesn't have a 1:30 Sunday game until the last game of the season, in mid-September. They have two early season contests at 3-ish, but the rest of the year it's late afternoon/early evening on Sunday.

Is there a reason Reading doesn't play Sunday afternoon games?