在操场上工作时，Golang时间解析无法正常工作

I need to parse a datetime string that is generated by a pseudo random datetime generator that uses Unix() function. The generated datetime takes various date and time pairs between 2010 and 2017. Here's the problem, this version of the code works on both my computer and playground,

package main

import (
    "fmt"
    "time"
)

func main() {
    a := time.Date(2016, 1, 0, 0, 0, 0, 0, time.UTC).Unix()
    kk := time.Unix(a, 0)
    t, err := time.Parse("2006-01-02 15:04:05.999999999 -0700 MST", kk.String())
    if err != nil {
        panic(err)
    }
    fmt.Println(t)
}

But the version below works on playground and panics on my computer,

package main

import (
    "fmt"
    "time"
)

func main() {
    a := time.Date(2018, 1, 0, 0, 0, 0, 0, time.UTC).Unix()
    kk := time.Unix(a, 0)
    t, err := time.Parse("2006-01-02 15:04:05.999999999 -0700 MST", kk.String())
    if err != nil {
        panic(err)
    }
    fmt.Println(t)
}

Here's the error,

panic: parsing time "2017-12-31 03:00:00 +0300 +03" as "2006-01-02 15:04:05.999999999 -0700 MST": cannot parse "+03" as "MST"

The Go version I use is go1.8.3 darwin/amd64.

Any ideas?

The problem here is related with the abbreviation change for Europe/Istanbul.

Turkey switched from EET/EEST (+02/+03) to permanent +03, effective 2016-09-07. (Thanks to Burak AYDIN.) Use "+03" rather than an invented abbreviation for the new time.

Time package currently does not accept +03 as EET/EEST and this problem occurs when using a datetime string that contains +03 as timezone to parse in form of 2006-01-02 15:04:05.999999999 -0700 MST.