There is often confusion about when a Saudi exit/re-entry visa expires. Did you know that you can check the exact date your Saudi Visa expires online? Just go to the Saudi Muqeem site and enter both your Passport number and your Visa number and the details will be displayed.
You can change the language to English via a selection on the top left of the site.
Just remember: the expiry date is the date on which it is already expired, so you need to enter Saudi Arabia no later than the day BEFORE the expiry date!
Check your visa expiry date here: