I saw something like it last week 3 challenges and again this week in badge central
Next week's challenges:
Mahjong Garden: Match 750 tiles using the new Pogo tile set between Friday, April 13 and Monday, April 16! (Be sure to click the Tiles button, then select the Pogo tiles!)
Pinochle: Win the bid AND win the hand 12 times this week!
Phlinx: Make 50 groups of 5 or more stones fall to the ground this week!
until friday mahjong garden will remain as an upcoming challenge