Agatha Christie said this quote
“ And families now, families who have been separated throughout the year, assemble once more together. Now under these conditions, my friend, you must admit that there will occur a great amount of strain. People who do not feel amiable are putting great pressure on themselves to appear amiable! There is at Christmas time a great deal of hypocrisy, honourable hypocrisy, hypocrisy undertaken pour le bon motif, c'est entendu, but nevertheless hypocrisy. ”