Turn up those hearing aids…Toronto agency john st. has brought back its Granny-themed National Sweater Day campaign for the World Wildlife Fund (WWF). Ruth, Florence, Audrey, and a few other lovely ladies from Granny Call Centre 82.0 are back to convince Canadians to wear sweaters and lower the heater on Feb. 7 in an effort to save energy. You should check out the campaign’s site to meet all the grannies and read background info for the cause. You also have the option of nominating your own grandmother if she’s into ugly sweaters and environmental awareness.

The aforementioned john st. which recently amused us with its “Buyral” spoof, tapped into the secret of advertising for this one: Either cute babies or charming grandparents equals success. The only thing missing from the videos is a cutaway to cute babies in ugly sweaters. That would’ve been the equivalent of back-to-back Bingo’s in the nursing home. But the National Sweater Day campaign is still a smart revival for a good cause. Betty White better watch her back. Credits after the jump.

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