Eating turkey on Christmas day

My question is about Christmas Day. On this day all of my family are off work. My brother comes from London to meet my parents and all the brothers and sisters get together. We usually have a meal at my parents house. This is the time when turkey is available in abundance. So this is usually what is cooked. It has been brought to our attention that we are copying the Chritian faith in doing so. However, for us it is a get together because apart from the 2 Eids this is the only time we are off work together. Your thoughts on this matter will be greatly appreciated.