2021年《日落·初生》专辑巡演间，贺老六曾在台上说过这样的话： “今年我们和大家一样，遭遇了很多坎坷。本来想用这首歌给我们带来一些祝福，但没起什么作用，还是挺倒霉的。既然给我们带来不了运气，那就把运气给你们，这歌叫《开心一天是一天》，希望大家开心一天是一天。” 新的一年新的祝福，愿大家开心一天是一天！ He Laoliu said this on stage during the "Sunset·Birth" album tour in 2021: "This year, like everyone else, we have encountered a lot of ups and downs. Originally wanted to use this song to bring us some blessings, but it didn't work, so it was quite unlucky. Since we can't bring us luck, let us give you luck. , This song is called "Happy Day is a Day", I hope everyone happy day is every day." New year and new blessings, wish everyone happy day by day!