Were the servers shut down early?

I just tried to do some Halo Wars multiplayer and when I click search it says “Could Not Contact Xbox Live. Please Try Again”. As for Halo 3 I’ve noticed some people are saying that the servers have been glitching so I booted it up and got the typical “couldn’t retrieve data from the Halo 3 servers” message. So is it possible they are secretly trying to shut down the servers early? They were originally supposed to go offline in December after all so I wonder what’s going on.