Xmas Day morning for me is:
8.30am: Peer at light coming through crack in curtains. Pull duvet over head.
9am: Stumble out of bed. Grope for dressing gown on floor. Get frustrated and grumpy because it's half inside out.
9.03am: Wee. Peer at last night's make up in mirror. Decide it will be okay just to rub fingers under eyes for the moment.
9.07am: DH hands me glass of champagne to celebrate my surviving the night.
It goes on like this. On a good day, if people have been very generous, we will eat caviar and blinis and foie gras and toast mid morning. If people have been tight bastards we'll only eat Balik smoked salmon and Poilane bread
.
Sometimes I even get dressed - which means washing and putting on jogging pants and a top.
We'll eat our main meal, usually roast pork or chicken, about 4pm. More wine. Used to have Xmas pudding but in recent years DH likes to make his Patented Tarte Tatin. Sometimes it goes wrong resulting in much swearing and me saying, genuinely: 'It's lovely, darling. Can you open that Sauternes now?'.
We'll always watch a Christmassy DVD like Life of Brian, Trading Places or The Omen and then pass out at about 10.30pm.
Anyway, OP, it's not only traditional to have a starter on Xmas Day, it's a vital injection of protein and sugar and I couldn't get through the day without it.