My guess are
April 20th at 21.15
April 21st at 20.30
April 22nd at 22.30
just in case I guess same dates as othere, those guess's wont count so also guessing the following, as backup
April 22nd at 21.00
April 19th at 21.12
April 20th at 20.01
April 20th at 19.39
April 19th at 19.34
April 19th at 23.54