How to Get the Difference in Hours Between Two Dates in Go

Created May 9, 2022 at 15:22

Modified May 9, 2022 at 15:35

Using time.Since Function

The time.Since() function returns the time elapsed since t. It is shorthand for time.Now().Sub(t). For example,

package main

import (
  "fmt"
  "time"
)

func main() {
  layout := "2006-01-02 15:04"

  v := "2022-05-09 10:00"
  t, err := time.Parse(layout, v)
  if err != nil {
    // panic()
  }

  duration := time.Since(t)
  fmt.Println(duration.Hours())
}

-2.5214217017602776

Using Sub Function

The Time.Sub() function returns the duration t-u. If the result exceeds the maximum (or minimum) value that can be stored in a Duration, the maximum (or minimum) duration will be returned. To compute t-d for a duration d, use t.Add(-d).

package main

import (
  "fmt"
  "time"
)

func main() {
  layout := "2006-01-02 15:04"

  v := "2022-05-09 10:00"
  t, err := time.Parse(layout, v)
  if err != nil {
    // panic()
  }

  v = "2022-05-09 05:23"
  t2, err := time.Parse(layout, v)
  if err != nil {
    // panic()
  }

  duration := t2.Sub(t)
  fmt.Println(duration.Hours())
}