Hungarian doesn't have the verb "to have", but express it with "van" + object with some pronoun ending. For example:

• Van macskám = "I have a cat" or, literally, "There's a cat-my"

There is "van" and the object ("macska") with an ending (-m is for "I"; -d is for "you", etc.) and a linking vowel that can change depending on the noun. So, in the sentence above:

• Szép napunk van ma = maybe "there's a beautiful day-us today"

There's the "van" and "nap" with the personal ending for "we" (-nk/-unk/-ünk…)

I think that "Today is a beautiful day" translates to "Ma (egy) szép nap" but I'm not sure.

"nap" is day, napunk is "our day". If you want to learn more about how possession works in Hungarian take a look at this link: http://www.hungarianreference.com/Possession/SingleObjects.aspx

I've been known to exclaim, "What a pretty/lovely/gorgeous day," using any one of those descriptives.

But that could be used as well. English and many other languages are not limited in the variety of their expressions as long as the grammar is correct.