the government banned after hours after 2007 and so far the numbers are adding up for them - less traffic deaths than before. this is obviously a short-sighted view though, but anyway.
after hours still exist, they're simply private this year. there is no way to make them legal, but if people or promoters are a bit smart about it, they can still be done without any big issues. search the forums here, if you enter 'after hours' in the search machine you'll get a lot of threads where everything is explained in detail. this is basically a good advice before you post a new thread about anything - have a look first if such a discussion already exists; in 99% of the cases we'll have spoken about that very subject on here before