Although the dreary, leaking rain might suggest otherwise, tomorrow is the day the Parks Department picked to kick off the summer. New York City's 54 (a full list is here) outdoor pools open Saturday; general hours are 11:00 a.m. to 3:00 p.m. and 4:00 p.m. to 7:00 p.m. So go, dig out those dusty bathing suits and cross your fingers for some sun rays to match them. 