https://play.golang.org/p/O1FWb9O97ld
func main() {
//const longForm = "Jan 2, 2006 at 3:04pm (MST)"
t1, _ := time.Parse("03:04:05", "12:03:30")
fmt.Printf("current date time %v
", t1)
now := time.Now().UTC()
t1.AddDate(now.Year(), int(now.Month()), now.Day())
fmt.Printf("current date time %v", t1)
}
Output current date time 0000-01-01 12:03:30 +0000 UTC current date time 0000-01-01 12:03:30 +0000 UTC
Essentially I parse only time but want to add today's date to it. But nothing changed after calling time.AddDate()
AddDate doesn't change the value of the receiver (the receiver isn't a pointer). You need to assign the value to something, e.g.
t1 = t1.AddDate(now.Year(), int(now.Month())-1, now.Day()-1)
I'm also subtracting 1 from the month and the day since they started out at 1 and 1.
This is probably a better way to do what you want:
func main() {
//const longForm = "Jan 2, 2006 at 3:04pm (MST)"
t1, _ := time.Parse("03:04:05", "12:03:30")
fmt.Printf("current date time %v
", t1)
hour, min, sec := t1.Clock()
now := time.Now().UTC()
year, month, day := now.Date()
t1 = time.Date(year, month, day, hour, min, sec, 0, time.UTC)
fmt.Printf("current date time %v
", t1)
}