Calculate Number of Days Between Two Dates in Golang

package main

import (
	"fmt"
	"math"
	"time"
)

func main() {

	s1 := "20/08/2021"
	date1, _ := time.Parse("02/01/2006", s1)

	s2 := "25/08/2021"
	date2, _ := time.Parse("02/01/2006", s2)

	days := int(math.Ceil(date2.Sub(date1).Hours() / 24))
	fmt.Println("days: ", days)

}

Output

days:  5