It appears that the title for the first episode for Season 4 of The Walking Dead has become known, which may suggest the series takes a time jump.
It's being reported by TVLine that episode 401 is titled "30 Days Without an Accident" leading to speculation that Season 4 will not take place directly after the events of Season 3.
Someone in the comments even mentions they have a friend on set that states Season 4 will time jump by 1 year or more, though obviously that is unsubstantiated; however the user, Drew Pitchford, mentions it on his Twitter as well.
A time jump might actually make sense because David Morrissey is now a series regular in The Walking Dead, and the first episode title for Season 4 could perhaps be some sort of reference to "no incidents" with The Governor.
Another possibility is that "30 Days Without An Accident" could refer to getting bitten by a Biter, and interestingly enough, it's been said the zombies of Season 4 will be new and improved.
We will find out soon enough when The Walking Dead returns this October.