Old Favorite Day Lily

No idea the name of these beauties.  We planted them over 25 years ago and their name has been lost to us.  But with thousands of day lilies I guess we could just make something up.  I do know that they are in our garden every year and that they last a month or so, till after the 4th of July I think.  We love them, they are about 6 inches (15 cm) across and close up look like ice cream.