Mercredi six juin deux mille treize.
(It is worth noting, though, that June 6, 2013 was a Thursday, not a Wednesday.)
To say "happy Wednesday" in French say bon mercredi.
"mercredi"
Mercredi
On se verra mercredi
le dîner du mercredi
Mercredi premier août
The easiest way to say "I'll see you on Wednesday" would be simply "à mercredi !" but to be more literal you could say "je te vois mercredi" or "je te verrai mercredi"
To say the tenth of June in French, you would say "le dix juin."
Nous sommes aujourd'hui mercredi huit juin deux mille onze.
To say "Happy Wednesday," you can simply say "Happy Wednesday!" in English. If you're looking for translations, in Spanish, it’s "¡Feliz miércoles!" and in French, it's "Joyeux mercredi!" Each expression conveys a cheerful greeting for the day.
You would say "le seize juin" in French.
To say "the twenty fourth of June" in French, you would say "le vingt-quatre juin."