How to convert tradional American date string to ISO date string in Go (1.2.1)?

I need to convert a traditional American date, i.e "05/24/2024" to ISO date string i.e "20240524" in Go without painful string manipulation.

I tried this code:

func showISODate() {
    dateStr := "05/24/2024"                           // date in 'String' data type
    dateValue, err := time.Parse("20060102", dateStr) // convert 'String' to 'Time' data type
    if err != nil {
        log.Println(err.Error())
    }
    fmt.Println(dateValue)                          // output: 0001-01-01 00:00:00 +0000 UTC
    dateStr = dateValue.Format("20060102")  // output: 00010101
    fmt.Println(dateStr)
}

This code fails: Output is zeroed out, with error message: parsing time "05/24/2024" as "20060102": cannot parse "05/24/2024" as "2006"

What am I doing wrong? How should I do this?

>Solution :

The layout you pass to time.Parse should match the input format:

func showISODate() {
    dateStr := "05/24/2024"                       
    dateValue, err := time.Parse("01/02/2006", dateStr) // updated layout
    if err != nil {
        log.Println(err.Error())
    }
    fmt.Println(dateValue)
    dateStr = dateValue.Format("20060102")
    fmt.Println(dateStr)
}

Output:

2024-05-24 00:00:00 +0000 UTC
20240524