Get Time Duration in Go

package main

import (
    "fmt"
    "time"
)

func main() {
    p := fmt.Println

    now := time.Now()

    then := time.Date(
        2009, 11, 17, 20, 34, 58, 651387237, time.UTC)

    // The Sub methods returns a Duration representing the interval between two times.
    diff := now.Sub(then)
    p(diff)

    p(diff.Hours())
    p(diff.Minutes())
    p(diff.Seconds())
    p(diff.Nanoseconds())
}