Well, what I trying to do, have always tried to do, is look at our situation in terms of what is best for the kids.
So, if "his" Weds-Sunday fell while he was in California, and I stuck to a 'tough luck pal' stance, that means the kids would not see him for two weeks, other than the standard Weds night overnight. I don't think it is good for them to go that long without seeing him. Does he deserve it? Yes. Do they? No.
The reason he came over to bike riding is because he had not seen them in 7 days and he wanted to see them. However, his typical behaviors when dealing with Nathan on anything physical were displayed once again.
I know if it were just me I was concerned with, I would say I won't budge an inch from the pre-set calendar unless/until he can communicate with me respect fully. However I don't want to deprive the kids of time with their dad.
The summer schedule has YET to be addressed by Dan. Meaning, when he has them Weds-Sunday, what is going to happen to the kids? While he is at work, will he put them in day care for 10-11 hours all of those days? That seems silly when I am home and available much of that time. I asked him via email what his summer plans were back in late April and he never responded...he also never made any kind of schedule, contract with the day care and left that up to me to decide.
So I figured on his days he can drop them off with me in the morning on the way to work after he has them overnight. Then at noon I take them to daycare so I can go to my class, and then he can pick them up in the evening, and drop them off with me again the following morning. Yes that is me giving up "me time" but I see no reason for my kids to spend their whole summer in day care if I am around. However he has never addressed the subject yet...