This is in Canada, the other answer seems to be in the USA:
>Currently, YTV airs Pokémon the Series: XY every Saturday at 12:00 PM.
>Pokémon the Series: XY first premiered on Saturday, December 7, 2013 on YTV with the airings of Kalos, Where Dreams and Adventures Begin! and Lumiose City Pursuit!. These initial airings of the seventeenth season did not replace Saturday airings of Pokémon Black & White: Adventures in Unova, but were simply aired as a sneak peek. Continual airings of Pokémon the Series: XY began on February 15, 2014, though the sneak preview versions of XY001 and XY002 were aired instead of the regular versions.