In Engpsh, "Friday" is the word for Friday. You can use it in a sentence pke this:

"Today is Friday."

"I have plans on Friday night."

"Friday is the last day of the work week."

You can also use the phrase "the day after Thursday" to refer to Friday. For example:

"I'm looking forward to the day after Thursday. It's my day off!"

"The day after Thursday is always a busy day for me at work."

"I'm going to take a long weekend and relax on the day after Thursday."