Vielleicht eines Tages.
one day we will be together = wir werden eines Tages zusammen sein.
Vatertag.
Weihnachtstag
gorgeous day = herrlicher TAg
Me as a German, i can say we don't eat special food on that day :D
You don't say day-vid, you say dah-vid.
What day is it? = Welcher Tag ist es heute?
Pfannkuchentag is the translation in German. It is translated from English to German. German is mostly spoken in the European countries.
We didn't have this name. Maybe you could say Carly, it's also English but more popular!
"Happy Saint Patrick´s Day" in German is: Fröhlichen St. Patricks Tag
all day long = den ganzen Tag
My day is tiring translates as Mein Tag ist anstrengend.