Kay Jewelers cuts $50 off purchases $149 or more via coupon "50KC0000001018". Plus all items qualify for free overnight shipping. Orders placed before February 11 at 2 pm ET are guaranteed to arrive in time for Valentine's Day; although, custom-size rings won't arrive in time. (Purchases made by February 12 at 3 am ET still receive free overnight shipping, but aren't guaranteed to arrive for Valentine's Day.)