How Can I Calculate and Format the Difference Between Two Go `time.Time` Objects?

Calculating Time Differences with time.Time Objects

In programming with Go, representing points in time is crucial. The time.Time type provides functionality for manipulating time-related values. One common task is calculating the difference between two time points.

To obtain the time difference between two time.Time objects, you can utilize the time.Sub() method. The result is represented as a time.Duration value.

time.Duration formats itself in a way that accommodates the time difference. For example:

package main

import (
    "fmt"
    "time"
)

func main() {
    t1 := time.Now()
    t2 := t1.Add(time.Second * 341)

    fmt.Println(t1)
    fmt.Println(t2)

    diff := t2.Sub(t1)
    fmt.Println(diff)
}

Output:

2009-11-10 23:00:00 +0000 UTC
2009-11-10 23:05:41 +0000 UTC
5m41s

If you desire the time in the HH:mm:ss format, you can create a time.Time value and employ its Time.Format() method:

out := time.Time{}.Add(diff)
fmt.Println(out.Format("15:04:05"))

Output:

00:05:41

This approach is suitable for time differences under 24 hours. However, if the time spans multiple days or more, consider using a solution that accommodates larger time differences, such as the function provided in the following question:

• golang time.Since() with months and years

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