If temp is accurate most hatching should occur, appropriately, the same time of day and day of the week then went in. If you put yours in May 4, Wednesday, in the am then you’ll be looking at a Wednesday morning hatch. There is obviously a ton of variables here but I always consider this when planning hatches (because I love to watch the hatching). I’ve also used it to my advantage to do hatches with groups. I’ve had one zip and hatch during a Girl Scout meeting. Same this but with a homeschool co-op. With enough eggs set (couple dozen) one chick has always come through.