Getting a List of Usable Time Zones for Go's time.Format()
For providing users a convenient way to select time zones in your applications, you may need to populate a dropdown with a list of valid time zones. This list can be generated with a straightforward method in Go.
Solution:
To obtain a comprehensive list of commonly supported time zones that can be used with the time.Format() function, you can employ the following code:
package main import ( "fmt" "os" "strings" ) var zoneDirs = []string{ // Update path according to your OS "/usr/share/zoneinfo/", "/usr/share/lib/zoneinfo/", "/usr/lib/locale/TZ/", } var zoneDir string func main() { for _, zoneDir = range zoneDirs { ReadFile("") } } func ReadFile(path string) { files, _ := os.ReadDir(zoneDir + path) for _, f := range files { if f.Name() != strings.ToUpper(f.Name()[:1]) + f.Name()[1:] { continue } if f.IsDir() { ReadFile(path + "/" + f.Name()) } else { fmt.Println((path + "/" + f.Name())[1:]) } } }
Explanation:
- This code loops through potential time zone directories to locate valid time zones.
- It reads the directory contents and ignores entries with mixed casing.
- If an entry is a directory, it recursively calls the ReadFile function to continue searching.
- Time zone names are then printed without the leading slash.
Output:
Executing the code will produce a list of time zone names, such as:
Africa/Abidjan Africa/Accra Africa/Addis_Ababa Africa/Algiers Africa/Asmara ...
You can incorporate this list into your HTML template for a user-friendly time zone selection feature.
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