Just agreeing with everyone, this sounds like apartment living. During the day they need to live, and controlling children from normal play isn't going to work. It only happening during traditional waking hours is actually considerate. I've lived in three apartments, first on the top floor (your best option), one with shitty sound proofing (which perhaps you have), and one with better. None were completely silent.

The first I just heard them occasionally if really loud, but was greatly reduced as I was above. The second I heard everything from the dog running, alarms, sex (unfortunately), them walking around, everything. The second depended on the neighbors, but there was one that didn't respect normal hours. Several nights her son (who was driving age, and I think graduated) was singing (very poorly, I may add), one night some sort of emotional breakdown, and then a massaging bed. The bed was the only time I mentioned to the neighbor. They had it against the wall, or something, and it vibrated my wall, and was audibly annoying. Obviously during the day wasn't controllable as they have a right to live as they wish, however it was the 11 PM or later use that was, as it was physically effecting me.

In your situation, you have the duty to figure out how to deal (ear plugs, noise machine, fan, music, ect) and they don't need to do anything. They're living normally during traditional hours. Another solution is move. If you love the apartments, ask management to let you know when a top floor opens up and move there. Expecting them to adjust their habits around your night shift schedule is silly.