how to say.....!
if i can say....

またね！また明日！

can i say?

また日曜日！！

and what does it mean?

また日曜日やん！

また日曜日に。。！

or how can i say
"see you on sunday"?

Question

how to say.....!
if i can say....

またね！また明日！

can i say?

また日曜日！！

and what does it mean?

また日曜日やん！

また日曜日に。。！

or how can i say
"see you on sunday"?

Answer

you can say "また明日" and "また日曜日（に/ね/にね）" for greeting.
"また日曜日やん" does not mean "see you on sunday", might means "it's on sunday again!!" in a dialect...

Answer

The expression "See you tomorrow / on Sunday" actually has the meaning of "Let's meet tomorrow / on Sunday".　Hence, in this case, the Japanese translation is「また 明日に / 日曜日に 会いましょう。」　In short form, this becomes「また 明日に / 日曜日に」, and you may add「じゃね。」to indicate "bye".　That is it.　It is just that easy.　Good luck.

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