The bad news is you only have 10 more days to binge Buffy The Vampire Slayer before it’s gone from Netflix.
The good news is that if you start now, skip the intro music (which I rarely do because it’s awesome), and end credits you can watch the entire series in 6 days time.
As far as Angel is concerned you’d need about 4 days and 14 hours which would put you just short of the deadline.