us celebrate. >> oh, yeah. we have some classics. tator tots, pot pies. this day was named national frozen food day but none other than president ronald reagan, it happened back in 1984. he and the first lady apparently enjoyed their time with tv dinners. as you can see here, they did indeed. this is a picture from 1981. >> so how did this uniquely american invention come to be such a big part of our culture? >> this man, clarence birdseye, he was a biology who spent time in the arctic. while there, the eskimos would catch fish that froze as soon as they came out of the water. >> but months later he discovered that the fish would thaw out and taste just as good as if they were fresh. birdseye went to work on a machine that flash-freezes food. >> some of the first things off the line were veggies and veggies as a staple of the american diet. >> soon going global as seen in this ad, touting freshness of