A clock chimes twice at 30 minutes past each hour and chimes on the hour according to the hour. For example, at 1 PM there is one chime and at noon and midnight there are twelve chimes. Starting at 5:00 PM on April 1, 2007, on what date will the 1500th chime occur?
April 7
April 8
April 9
April 10
April 11
