Hello Erin,
We have weekly sales, weekend sales and monthly sales so items on sale change quite often. To know what is on sale during what times all you have to do is sign up for our newsletter. We send out emails to let you guys know what all is on sale and when and the newsletter is also how we let you know about coupon codes when we have them available. You can sign up for our newsletter on the homepage of our website.
Our facebook page also lets you know about all of our sales as well :) Thank you.
~Kristi @ ECS