3:30 pm - 7:30 pm
Smart Casual: neat, conventional, yet relatively informal in style, especially as worn to conform to a particular dress code. ‘think of a smart casual outfit as one that you'd wear for a movie or dinner date’
Unless weather is poor, the ceremony itself will be held outdoors (though mostly in the shade), so certainly don't overdress for the June heat! The reception and dinner, however, that will immediately follow will be indoors.