I haven't seen it listed here already but according to the Toys R Us Canada FB page, today (Oct 18 at 11am local time) it's My Little Pony Spa Day.
"Bring your friends for a special ponifying experience! Join us in-store for fun activities, giveaways and much more!
Plus, make a personalized name plate with Scrabble letters!
No purchase necessary. While quantities last. Excludes Toys“R”Us Cedarbrae Mall and Express store locations."