14May 2024 Krystal FREE Slider! by Jackie ⋅ Leave a Comment Spread the loveTweet Krystal is celebrating National Slider Day by offering a FREE slider with any purchase on May 15, 2024! Be sure to mention Promo Code: SLIDERDAY at checkout to get your freebie! Offer valid on original or cheese Krystal. Posted in: Daily Restaurant Deals ⋅ Tagged: free food, restaurant coupons, restaurant deals