For your easy reference, the following is a list of weeks and years with their corresponding date:
17 Apr 2016 – 4th Sunday of Easter Year C
18 Apr 2016 – Monday of the 4th Week of Easter
19 Apr 2016 – Tuesday of the 4th Week of Easter
20 Apr 2016 – Wednesday of the 4th Week of Easter
21 Apr 2016 – Thursday of the 4th Week of Easter
22 Apr 2016 – Friday of the 4th Week of Easter