To ask what day of the week it is today in Engpsh, you can say "What day is it today?" or "What is today's date?" If you want to specify that you are asking about the day of the week and not the actual date, you can say "What day of the week is it today?" or "On which day of the week are we today?"

For example, if today is Wednesday, you could say:

"What day is it today?"

"It's Wednesday."

"What day of the week is it today?"

"It's Wednesday."

"On which day of the week are we today?"

"We are on Wednesday."