The only company that I felt actually stood by this was linkedin. On top of their whole week off for July 4th and Christmas I actually observed people taking

The only company that I felt actually stood by this was linkedin. On top of their whole week off for July 4th and Christmas I actually observed people taking 1-1.5 weeks each quarter on average as part of flex time. Plus with "in days" (1 Friday each month to do absolutely anything including staying home) it was almost 8 weeks of leave each year. Not sure if things are the same now (this was until 2 years ago in the US). I doubt any other company was this generous.