Why is my wife unable to say "have a good day"?

Because she's a woman...

This is clearly bothering you. There are many possible reasons.

Maybe she grew up in a house where people said "see you later"

Maybe she has spent a lot of time in retail where she must say "Have a good day" and she feels it is devoid of emotional power now.

Maybe she had some sort of traumatic experience that makes her afraid to say these things.

Have you asked her about it? If it means something to you for her to say these things, let her know. She may not realize that this is bothering you.

Have a Good Day!

and Christmas.. an even better New Years and a Marvelous Ski Trip!

*someday, I am going with you.

This is kind of an odd question. Does she express her love in other ways? Will she say, "I love you?"

Some people feel weird saying sweet little nothings again and again.

maybe let her know that it's bothering you, and that you need more affection from the relationship.

Maybe to her it's not the life-altering, huge deal you're making it out to be. Some people have trouble verbally expressing their feelings. Maybe she shows you in other ways that you're totally deciding to ignore. Maybe she does other things to make your life easier (because she loves you), doesn't make a big deal about it and you just ignore that she's done something to help you because she loves you.

If my husband doesn't say something I'm expecting him to say, I don't get upset about it.. It's no big deal... I know he doesn't wish harm on me because he's not used to saying certain things..... I make a joke about it and tell him "Thank you... you have a nice day too." That prompts him to tell me what I want to hear and we're joking about it... not being miserable.

You're as happy as YOU let yourself be and you're also as miserable as you decide to be.... You get to choose which one you want.

Have you said to her what you expect from her, just start from today and waiting for her response and after her reaction, say to her what you want to listen from her as-usually.

She is a callus person at all.

And why would you marry someone who doesn't fulfill your emotional needs? She sounds cold.