Hosted by Afterpay, AfterYAY Day 2018 is on Today 16th of August 2018 for 24 hours. Note that it appears that most, if not all of the general sales don't require Afterpay to be used.
To see the deals/more details:
Participating Stores
Afterpay Facebook Page
AfterYAY Day Event Link
Feel free to post any deals on ChoiceCheapies and tag the deals with Afterpay Day, they will appear on the ChoiceCheapies AfterYAY 2018 Sales & Promotions Page.