How often he sees her and the days these fall on arent structured. So he might not see her at all, or one or twice. Sometimes just in the day sometimes overnight. I would love to set up a parenting plan but he works shifts and swaps from mornings to nights. So basically I have to be flexible around him even though it gives me or little one no structure, routine or consistency. It really winds me up tbh.
You arent being unreasonable, you offered boxing day as you'd like little one to believe the christmas magic which is fair . If declines then dont give in, he cant be picky if he rarely sees the little one
How involved is he? You say he picks and chooses is this because there's no set parenting plan in place? Does he have her overnight? Is he seeing her weekly? Monthly etc? Just from this, I would probably talk to him about getting a parenting plan in place so you both know who has her when. If he doesn't turn up on his time, that's his time forfeited. Either split Christmas day or do alternate years when the parent who doesn't get Christmas as above, gets boxing day.