获取 格式化：

func main() {
fmt.Println(time.Now())
fmt.Println(time.Now().Local())
fmt.Println("--------------")
//////////////////////////////
currentTime := time.Now().Local()
newFormat := currentTime.Format("2006-01-02 15:04:05.000")
fmt.Println(newFormat)
fmt.Println("--------------")
myTime := time.Date(2018, time.December, 17, 23, 59, 59, 999, time.UTC)
myTime1 := time.Date(2018, time.December, 17, 23, 59, 59, 999, time.UTC)
fmt.Println("MyTime:", myTime.Format("2006-01-02 15:04:05.000"))
fmt.Println("--------------")
if myTime==myTime1 {
fmt.Println("=======")
}

增加：

import "strings"
func main() {
// Add 时间相加
now := time.Now()
// ParseDuration parses a duration string.
// A duration string is a possibly signed sequence of decimal numbers,
// each with optional fraction and a unit suffix,
// such as "300ms", "-1.5h" or "2h45m".
// Valid time units are "ns", "us" (or "?s"), "ms", "s", "m", "h".
// 10分钟前
m, _ := time.ParseDuration("-1m")
fmt.Println(m)
m1 := now.Add(m)
fmt.Println(m1)
fmt.Println("----------------------------")
// 8个小时前
h, _ := time.ParseDuration("-1h")
h1 := now.Add(8 * h)
fmt.Println(h1)
fmt.Println("----------------------------")
// 一天前
d, _ := time.ParseDuration("-24h")
d1 := now.Add(d)
fmt.Println(d1)
fmt.Println("----------------------------")
printSplit(50)
fmt.Println("----------------------------")
// 10分钟后
mm, _ := time.ParseDuration("1m")
mm1 := now.Add(mm)
fmt.Println(mm1)
fmt.Println("----------------------------")
// 8小时后
hh, _ := time.ParseDuration("1h")
hh1 := now.Add(hh)
fmt.Println(hh1)
fmt.Println("----------------------------")
// 一天后
dd, _ := time.ParseDuration("24h")
dd1 := now.Add(dd)
fmt.Println(dd1)
printSplit(50)
fmt.Println("----------------------------")
// Sub 计算两个时间差
subM := now.Sub(m1)
fmt.Println(subM.Minutes(), "分钟")
fmt.Println("----------------------------")
sumH := now.Sub(h1)
fmt.Println(sumH.Hours(), "小时")
fmt.Println("----------------------------")
sumD := now.Sub(d1)
fmt.Printf("%v 天\n", sumD.Hours()/24)
}
func printSplit(count int) {
fmt.Println(strings.Repeat("#", count))
}

比较：

func main() {
format := "2006-01-02 15:04:05"
now := time.Now()
//now, _ := time.Parse(format, time.Now().Format(format))
a, _ := time.Parse(format, "2019-03-10 11:00:00")
b, _ := time.Parse(format, "2015-03-10 16:00:00")
fmt.Println("now:",now.Format(format), "\na:",a.Format(format),"\nb:", b.Format(format))
fmt.Println("--- a > now > b -----------")
fmt.Println("now a After: ",now.After(a))
fmt.Println("now a Before:",now.Before(a))
fmt.Println("now b After:",now.After(b))
fmt.Println("now b Before:",now.Before(b))
fmt.Println("a b After:",a.After(b))
fmt.Println("a b Before:",a.Before(b))
fmt.Println(now.Format(format), a.Format(format), b.Format(format))
fmt.Println(now.Unix(), a.Unix(), b.Unix())
}