Fun
A straight answer, plus exactly how much longer if not.
This counts down to midnight at the start of Friday in your browser's local timezone. If you're already in the weekend (Saturday or Sunday), it'll tell you that instead, since technically the countdown-worthy question at that point has already been answered.
Related
How many full weekends are left in the year.
A countdown to any other custom date.
What day of the week any date falls on.