Yes, it's true.
Good Friday?
Missing.
Not present.
AWOL.
Scripture never records the day of the week that Messiah was crucified... whether it was Good Friday, Good Tuesday, or any other specific day of the week.
There are a number of clues recorded in the Gospels but the specific date is never given.
If you would like to know more, check our our When Yeshua was Crucified article.