Demonstration of time marshalling and unmarshalling in Go

yaml-time.go

package main

import (
	"fmt"
	"time"

	yaml "gopkg.in/yaml.v2"
)

type Data struct {
	T time.Time
}

func main() {
	d := &Data{time.Now().UTC()}
	fmt.Printf("   initially: %+v\n", d)

	m, err := yaml.Marshal(d)
	if err != nil {
		panic(err)
	}
	fmt.Printf("  marshalled: %q\n", string(m))

	d2 := new(Data)
	if err := yaml.Unmarshal(m, d2); err != nil {
		panic(err)
	}
	fmt.Printf("unmarshalled: %+v\n", d2)
}

Example output:

$ go run main.go
   initially: &{T:2019-05-13 10:31:01.76718161 +0000 UTC}
  marshalled: "t: 2019-05-13T10:31:01.76718161Z\n"
unmarshalled: &{T:2019-05-13 10:31:01.76718161 +0000 UTC}