英文:
How to format a local time object in Go with correct minutes?
问题
我正在尝试将UTC（+0000）时间格式化为本地时间（在我这种情况下是东部时间），而不硬编码任何时区偏移量（以避免实现夏令时校正）。
我有以下代码展示了我遇到的问题：
package main
import (
"fmt"
"time"
)
func main() {
// 这里加载时区
timezone, _ := time.LoadLocation("America/New_York")
// 解析时间
t, _ := time.Parse("Mon Jan 2 15:04:05 +0000 2006", "Tue Jul 07 10:38:18 +0000 2015")
// 这看起来是正确的，它仍然是一个UTC时间
fmt.Println(t)
// 2015-07-07 10:38:18 +0000 UTC
// 这似乎没问题 - 减去4小时以转换为东部时间
t = t.In(timezone)
fmt.Println(t)
// 2015-07-07 06:38:18 -0400 EDT
// 这打印的是上午6:07，完全不正确，应该是上午6:38
fmt.Println(t.Format("Monday Jan 2, 3:01pm"))
// Tuesday Jul 7, 6:07am
}
所以在我看来，它解析和转换时区都没问题，但是当我使用格式化输出时，它会去掉分钟并使用07。无论我将分钟设置为什么，它总是显示为07。
英文:
Edit: I have updated the question with code that highlights why the alleged duplicate's solution doesn't work for me
I am trying to take UTC (+0000) times and format them into local times (eastern time in my case) without hard coding any timezone offsets (as to avoid implementing dst correction).
I have the following code which demonstrates the problem I am having
package main
import (
"fmt"
"time"
)
func main() {
// Here I load the timezone
timezone, _ := time.LoadLocation("America/New_York")
// I parse the time
t, _ := time.Parse("Mon Jan 2 15:04:05 +0000 2006", "Tue Jul 07 10:38:18 +0000 2015")
// This looks correct, it's still a utc time
fmt.Println(t)
// 2015-07-07 10:38:18 +0000 UTC
// This seems to be fine - -4 hours to convert to est
t = t.In(timezone)
fmt.Println(t)
// 2015-07-07 06:38:18 -0400 EDT
// This prints 6:07am, completely incorrect as it should be 6:38am
fmt.Println(t.Format("Monday Jan 2, 3:01pm"))
// Tuesday Jul 7, 6:07am
}
(https://play.golang.org/p/e57slFhWFk)
So to me it seems that it parses and converts timezones fine, but when I output it using format, it gets rid of the minutes and uses 07. It doesn't matter what I set the minutes to, it always comes out as 07.
答案1
得分: 1
你的布局（格式）字符串是错误的。如 time 包的文档中所述，布局字符串必须表示以下时间格式：
Mon Jan 2 15:04:05 MST 2006
在解析时，使用以下格式字符串：
t, _ := time.Parse("Mon Jan 02 15:04:05 -0700 2006", "Tue Jul 07 10:38:18 +0000 2015")
在打印时，使用以下格式字符串：
fmt.Println(t.Format("Monday Jan 2, 3:04pm"))
这将得到你期望的输出：
Tuesday Jul 7, 6:38am
在 Go Playground 上试一试。
英文:
Your layout (format) strings are incorrect. As noted in the doc of the time package, the layout string must denote this time:
Mon Jan 2 15:04:05 MST 2006
When parsing, use the following format string:
t, _ := time.Parse("Mon Jan 02 15:04:05 -0700 2006", "Tue Jul 07 10:38:18 +0000 2015")
And when printing, use this format string:
fmt.Println(t.Format("Monday Jan 2, 3:04pm"))
This will result in your expected output:
Tuesday Jul 7, 6:38am
Try it on the Go Playground.
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