That's a nice day.

Regarding marriage.... 30's & 40's and up... you must resist cynicism and despair in your marriage... but, young people--gah gah over each other .... recognize that it is possible that the veterans have a slightly nuanced view of marital bliss than you. A weak illustration may help:

Sam Elliott plays a crusty & seasoned St. Major in We Were Soldiers. Plays it brilliantly! The kind of man who eats oatmeal while chewing on a cigar.

Early in the movie there are two tone-setting and funny exchanges as the SGT. MAJOR passes a Staff Sgt

Sgt: "Good morning, Sgt Major"
Sgt Major: How the do you know what kind of a day it is going to be?"

another day...
Sgt: "Beautiful Morning, Sgt Major."
Sgt Major: "What, are you the weatherman now?"

after a day and half of battle, in which the young seargeant's platoon gets trapped behind enemy lines and is later rescued.... as the sun descends...
The young seargeant is not so green anymore. He is tested. He's still alive. The eyes of the Sgt and the Sgt Major meets and the voice of experience says:

"Now that is a nice day."

I take it to mean... you've fought the good fight, and you are alive... and you haven't given up.