Footy On Thursdays?

As you may know, most EPL games are played on Fridays, Saturdays and Sundays. But now Liverpool are playing on a Thursday. My question is, why are we all of a sudden playing on a Thursday? It could be that there is another international break coming up but we are playing Brighton on Sunday and then Spartak Moskva the following Thursday so that theory is out of the picture. Thinking of other possibilities has left me bewildered. Do you know about this sudden change of schedule? But after all the more games the better.