DH is Jan 19 & I am Jan 20th, So, we celebrate both days(Cake and Ice Cream two days in a row!.)
. My Friends always keep Christmas and Birthday seperate.
As for growing up, No, Christmas and Birthday was one gift. Usually clothing, Shoes etc. I will be 65 in Jan and have never had a Birthday Party, And That is fine with me.
I like the idea of a two months at once, for the Holidays it will work great for me.