J'esp
j'espere que tu a (vous avez) un bon jour
Gobeithio y cei di ddiwrnod gwych! (I hope you have a wonderful day!)
The sentence structure is a bit awkward. It would be better to say, "Have a wonderful day ahead" or "I hope you have a wonderful day ahead."
Well, there are many ways to say wonderful in French. Here are some...Magnifique, merveilleux, fabouleux, fantastique, but there is no way to actually say the word wonderful in French. =D
I wish you a wonderful day/ Hope you have a wonderful day/ Have a wonderful day.
They have a wonderful day: ils/elles passent une merveilleuse journée; have a wonderful day (imperative mood) : passez une merveilleuse journée.
I love you dad! Hope you had a great day of wonderful memories.
Avoir une belle journée
vict ta mere.
Espero que tenga un buen dia
avoir un jour merveilleux tout le monde
'Have a lovely day' would be translated 'passe une bonne journée' in French.