Sending you a hug tonight. That first year is hard with all the special days being different. It gets easier though, I promise. Memories of your new family dynamics are made, and they will be good ones. When you reflect on them there isn't someone missing from them ya know?
Today was hard here too. My oldest slept through it mostly, my 11yo skyped his dad every hour until he could reach him, one 6yo kept asking me over and over to take him to his dad and made up stories of his dad coming for him and what they would do and the other 6yo didn't want to talk to him. He didn't know what to say. The whole thing just sucks.