Golang-时间格式奇怪的行为[重复]

Question

This question already has an answer here:

• Parsing date string in Go 6 answers

This is a part of a bigger code. I am little confused that if I use any other digit in the below format it results in wrong values.

so instead of

fmt.Println(time.Now().Format("2006-01-02 15:04:05-07:00"))

if I try to use

 fmt.Println(time.Now().Format("2006-01-02 12:04:05-04:00"))

Result is wrong. Even when it is same format, just digit change

package main

import (
    "fmt"
    "time"
)


func main() {

    fmt.Println(time.Now().Format("2006-01-02 15:04:05-07:00"))

}

So my question is why is it so. Digits inside format have no meaning. They are just for representation of the format.

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Answer 1

From https://golang.org/pkg/time/:

func (Time) Format

func (t Time) Format(layout string) string

Format returns a textual representation of the time value formatted according to layout, which defines the format by showing how the reference time, defined to be

Mon Jan 2 15:04:05 -0700 MST 2006

would be displayed if it were the value;

So you must use the reference time. You should not change it to another time.