Cant Create File Name with Time Stamp

Creating a file name as a timestamp in a batch job

CP source.log %DATE:~-4%-%DATE:~4,2%-%DATE:~7,2%.log

But it's locale dependent. I'm not sure if %DATE% is localized, or depends on the format specified for the short date in Windows.

Here is a locale-independent way to extract the current date from this answer, but it depends on WMIC and FOR /F:

FOR /F %%A IN ('WMIC OS GET LocalDateTime ^| FINDSTR \.') DO @SET B=%%A
CP source.log %B:~0,4%-%B:~4,2%-%B:~6,2%.log

Append TimeStamp to a File Name

You can use DateTime.ToString Method (String)

DateTime.Now.ToString("yyyyMMddHHmmssfff")

or string.Format

string.Format("{0:yyyy-MM-dd_HH-mm-ss-fff}", DateTime.Now);

or Interpolated Strings

$"{DateTime.Now:yyyy-MM-dd_HH-mm-ss-fff}"

There are following custom format specifiers y (year), M (month), d
(day), h (hour 12), H (hour 24), m (minute), s (second), f (second
fraction), F (second fraction, trailing zeroes are trimmed), t (P.M or
A.M) and z (time zone).

With Extension Method

Usage:

string result = "myfile.txt".AppendTimeStamp();
//myfile20130604234625642.txt

Extension method

public static class MyExtensions
{
    public static string AppendTimeStamp(this string fileName)
    {
        return string.Concat(
            Path.GetFileNameWithoutExtension(fileName),
            DateTime.Now.ToString("yyyyMMddHHmmssfff"),
            Path.GetExtension(fileName)
            );
    }
}

How to append a timestamp to a file name?

here is the way we ended up doing it:

SET today=%DATE:~10,4%%DATE:~4,2%%DATE:~7,2%%TIME:~0,2%%TIME:~3,2%%TIME:~6,2%%TIME:~9,2%
SET today=%today: =0%

REM the second SET today was required because there was some weird execution with the 
REM timestamp happening at 8:00 am. something wrong with the formatting so the files were 
REM never getting timestamped at that time, but by adding that line the issue was resolved.

copy /y N:\test1\file1.csv N:\archive\file1_%today%.csv

File = open() using date in file name error out, Python

If you're doing Windows, Windows doesn't allow files with colons (:). Try removing your colon from here:

str(today.strftime("%y%b%d_%H:%M:%S"))

and see what happens

Current timestamp as filename in Java

No need to get too complicated, try this one liner:

String fileName = new SimpleDateFormat("yyyyMMddHHmm'.txt'").format(new Date());

Timestamp on file name using PowerShell

You can insert arbitrary PowerShell script code in a double-quoted string by using a subexpression, for example, $() like so:

"C:\temp\mybackup $(get-date -f yyyy-MM-dd).zip"

And if you are getting the path from somewhere else - already as a string:

$dirName  = [io.path]::GetDirectoryName($path)
$filename = [io.path]::GetFileNameWithoutExtension($path)
$ext      = [io.path]::GetExtension($path)
$newPath  = "$dirName\$filename $(get-date -f yyyy-MM-dd)$ext"

And if the path happens to be coming from the output of Get-ChildItem:

Get-ChildItem *.zip | Foreach {
  "$($_.DirectoryName)\$($_.BaseName) $(get-date -f yyyy-MM-dd)$($_.extension)"}

Filename timestamp in Windows CMD batch script getting truncated

Thanks to an answer to Stack Overflow quesion Creating a file name as a timestamp in a batch job, I found that it was a space terminating the filename.

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