The formal, polite way to say, "Have a good day" in German is "Ich wünsche Ihnen einen schönen Tag."
When you talk to a friend or a family member: "Ich wünsche dir einen schönen Tag." Or you can also say "angenehm" instead of "schön" ("schönen" is a form of "schön", which means pretty or beautiful. "Angenehm" means "comfortable"). So it would be "Ich wünsche Ihnen/Dir einen angenehmen Tag" then.
If you are leaving e.g. a shop you can use the slightly abbreviated form "einen schönen Tag noch!" (have a good day), the reply will be "Danke, Ihnen auch!" (thanks, same to you).
Schöner sonniger Tag heute
Dankeschön für den schönen Tag.
Ich wünsche Ihnen einen schönen Tag!
You are nice. = Du bist nett.
The verb is 'is' . The definitive verb is 'to be',
Agreed with this statement 13 have a nice day
nice software = gute Software
Net
Depending on context, nice can be translated as:nettangenehmschön
nice day
Today will be a nice day if you make it a nice day. It is not necessarily the weather that makes a day nice but rather the attitudes that people have that determine how nice it will be today.
Schoenes Winter