Calculate number of days between two dates?

Question

How can I calculate the number of days between two dates? In the code below I should get the number of hours, which means that I should only need to divide by 24. However, the result I get is something like -44929.000000. I'm only looking a day or two back so I would expect 24 or 48 hours.

package main  import (     "fmt"     "time" )  func main() {     timeFormat := "2006-01-02"      t, _ := time.Parse(timeFormat, "2014-12-28")     fmt.Println(t)     //  duration := time.Since(t)     duration := time.Now().Sub(t)     fmt.Printf("%f", duration.Hours()) } 

Here's the executable Go code: http://play.golang.org/p/1MV6wnLVKh

Answer 1

Your program seems to work as intended. I'm getting 45.55 hours. Have you tried to run it locally?

Playground time is fixed, time.Now() will give you 2009-11-10 23:00:00 +0000 UTC always.

Answer 2

package main  import (     "fmt"     "time" )  func main() {      date := time.Now()     fmt.Println(date)      format := "2006-01-02 15:04:05"     then,_ := time.Parse(format, "2007-09-18 11:58:06")     fmt.Println(then)      diff := date.Sub(then)      //func Since(t Time) Duration     //Since returns the time elapsed since t.      //It is shorthand for time.Now().Sub(t).      fmt.Println(diff.Hours())// number of Hours     fmt.Println(diff.Nanoseconds())// number of Nanoseconds     fmt.Println(diff.Minutes())// number of Minutes     fmt.Println(diff.Seconds())// number of Seconds      fmt.Println(int(diff.Hours()/24))// number of days      } 

Here is the running code https://play.golang.org/p/Vbhh1cBKnh