Holidays are a terrible interruption to the writer. Family, friends if you have them, shopping, cooking and eating all conspire to keep you from the computer. Or in my case sheets of lined loose leaf paper.
I keep to writing in the mornings when I'm freshest. I get up, make breakfast and write while I eat. Then the rest of the day is pent doing whatever I have to. Sometimes I can write a little at night once I put my pet bird Igor to bed. But that is rare, my brain is fried by the end of the day and writing becomes a chore.
But that little bit in the morning. I try for 45 minutes but frequently end up with less. BUT even with that little bit, 15 min some days, I can add to my manuscript. A paragraph, two paragraphs, if I'm lucky two or three pages.
As slow going as it is it will all add up in the end.