I think it is hit and miss. No set time. I would recommend creating an account and subscribing to their newsletter and check from time to time. I was vacationing in Hawaii this summer (had a blast in Oahu and Maui!!!) and on the last day of the sale with like 4 HRS left I saw their email announcing the week long sale in my junk folder while I was lying in bed in the hotel! I emailed them right away to confirm how much time I had to order and Holly was so responsive! IIRC she responded during off hours! Ofc later the prices had a pretty big increase so it all worked out for me.Could someone fill me in on the Aero sales - how often are they and what’s the discount? I’ve not bought from them and would ideally want to tie an order in with a sale and a trip up to Scotland to get measured properly. Just wondering when that’s likely to be.