package main
import (
"fmt"
"time"
)
func main() {
now := time.Now()
fmt.Println(now)
// AddDate(y, m, d)
dt := now.AddDate(-1, 0, 0)
fmt.Println(dt)
}
/*
run:
2020-08-13 13:34:02.039222314 +0000 UTC m=+0.000135653
2019-08-13 13:34:02.039222314 +0000 UTC
*/