Take a peek at this capitalization (or rather, lack of capitalization) of Christmas on Yahoo! DIY:
Who doesn’t know to capitalize the holiday? The same person who doesn’t know that using that to refer to human beings is considered impolite. The pronoun who would be more to Emily Post’s liking.
Just one peek into this paragraph reminds us that the writer isn’t fond of capitalizing holidays like Valentine’s Day:
Or Mother Nature:
Reading that, you feel like you are really peeking into the mind of the writer, who has trouble picking the right homophone and who forgets to use an apostrophe to show that it’s kids’ art.