Which day he will coming?
I 'd like to ask some question. I 'm not sure this sentence mean he will come again on which day?

For example :
He write on a note "I am out of office until 24/6/2013 and returning 24/6/2013"
So, 12/6/2013 he will work on that day?

Question

Which day he will coming?
I 'd like to ask some question. I 'm not sure this sentence mean he will come again on which day?

For example :
He write on a note "I am out of office until 24/6/2013 and returning 24/6/2013"
So, 12/6/2013 he will work on that day?

Answer

'Until' usually doesn't indicate whether or not it includes the designated time. The 'returning 24/6/2012' part is added to clarify this, indicating he will work on that day.

By the way, your question should be: "On which day will he come?/Which day will he come on?" or better yet: "When will he come?".
"I'd like to ask a question. I'm not sure which day this sentence means he will come."