datesort.go

package main

import (
  "fmt"
  "sort"
  "time"
)

type Master []time.Time

func (m Master) Len() int {
  return len(m)
}

func (m Master) Swap(i, j int) {
  m[i], m[j] = m[j], m[i]
}

func (m Master) Less(i, j int) bool {
  return m[i].Before(m[j])
}

func main() {
  fmt.Println("Sort begin ... ")

  day := 1 * 24 * time.Hour
  is := Master{
    time.Now(),
    time.Now().Add(1 * day),
    time.Now().Add(2 * day),
    time.Now().Add(5 * day),
    time.Now().Add(7 * day),
    time.Now().Add(-1 * day),
    time.Now().Add(-2 * day),
  }
  sort.Sort(is)

  fmt.Println(is)

  fmt.Println("Sort end ...")
}