"We are having the most extraordinary Christmas Day imaginable. A sort of unarranged and quite unauthorized but perfectly understood and scrupulously observed truce exists between us and our friends in front. The funny thing is it only seems to exist in this part of the battle line—on our right and left we can all hear them firing away as cheerfully as ever. The thing started last night—a bitter cold night, with white frost—soon after dusk when the Germans started shouting 'Merry Christmas, Englishmen' to us. Of course our fellows shouted back and presently large numbers of both sides had left their trenches, unarmed, and met in the debatable, shot-riddled, no man's land between the lines. Here the agreement—all on their own—came to be made that we should not fire at each other until after midnight tonight. The men were all fraternizing in the middle (we naturally did not allow them too close to our line) and swapped cigarettes and lies in the utmost good fellowship. Not a shot was fired all night."
January 1, 1970
https://en.wikiquote.org/wiki/World_War_I_Christmas_truce