White Christmas

I'm dreaming of a white Christmas, just like the ones I used to know.
Where the treetops glisten, and children listen
To hear sleigh bells in the snow.

I'm dreaming of a white Christmas with every Christmas card I write.
May your days be merry and bright
and may all your Christmases be white.

重点讲解

may all your Christmases be white
这是一个由may构成的祝愿性句子：may+主语+动词原形

a white christmas  n.
人们心中典型的圣诞景象的代称（白色的雪花，白色的原野，圣诞老人的白胡子），white也是merry和bright的象征