These nine songs have three things in common. What are the commonalities?

Two of the three are fairly obvious, the third is not so much

1. “O Come O Come Emanuel”
Rejoice! Rejoice! Emanuel shall come thee, O Israel

2. “Christmastime” (From the Charlie Brown Christmas)
Christmas time is here,
happiness and cheer,
fun for all
that children call
their favorite time of year.

3. “My Favorite Things”
Brown paper packages tied up with strings
These are a few of my favorite things.

4. “God Rest Ye Merry Gentlemen”
O tidings of comfort and joy,
Comfort and joy
O tidings of comfort and joy.

5. “What Child is this?”
Joy, joy for Christ is born,
The Babe, the Son of Mary.

6. “How Great Our Joy”
How great our joy (great our joy) Joy, joy, joy (joy, joy, joy)

7. “Carol of the bells”
Christmas is here,
bringing good cheer,
to young and old,
meek and the bold,

8. Pat-a-Pan

God and man today become
More in tune than fife and drum,
So be merry while you play!

9. Fum, Fum, Fum

On this joyful Christmas Day
Sing fum, fum, fum

Did you figure it out?

Here are the traits these nine songs have in common:

1. All of them are songs you might hear at Christmastime.

2. All of them have lyrics dealing with Joy, Wonder and Happiness.

Those are the more readily apparent commonalities. Here is the one less noticeable, and more ironic.

3. All* of them are in a minor key.

Did I miss any that should be in the list?

In any case, never let it be said that a minor song is never happy. Especially in the month of December.

* Okay, if you want to be picky, “Christmastime” is at least non-major.