I'm away at a conference next week. This was planned a long time ago - DH has known about it since September 2014.
It seems to have finally dawned on him that he will have to juggle the DC and the ever-changing school sports events. Usually I handle this side of things as I have a shorter commute. I know it is a PITA (different every week), but it is a consequence of having sporty DC (private school - they are expected to attend if picked for the team).
He's spent the evening saying things like: 'but what time does rounders finish' (A: look at the information sheet - every match is different as it depends where they are travelling to/from). 'Does DS have to attend the event even if everyone else is available?' (DS is the reserve - I know no more than he does).
WIBU to just detach and let him deal with it?