The prediction is that the peak should occur between 5:30 and 7:30 UT on August 13, which translates to 10:30 p.m. Sunday to 12:30 a.m. Monday. The radiant (near the Double Cluster) is high enough to begin looking for Perseids by about midnight. Since Perseid activity is not very sharply peaked and the altitude of the radiant is a much larger factor in seeing meteors, the best rates will be seen Monday morning just before twilight, at around 4 a.m. As Rick says, there will be plenty of Perseids on Sunday morning as well. I had it in my head that the shower was always on the night of August 11/12, but it moves to August 12/13 in the year before the leap year. Tom