Filename timestamp in Windows CMD batch script getting truncated

Question

I have a batch script that outputs a file, and I'm trying to ensure that each time the script is executed, no existing files are overwritten, so I'm trying to put a timestamp on it.

Currently I have this:

set  stamp=%DATE:/=-%_%TIME::=-% 

But if the time is 1-9 AM, it gives something like:

13-06-2012_ instead of a full 13-06-2012_12-39-37.28 

How can I fix this?

I'm using Windows 7, and the output of echo %date% %time% in a command line window is (my clock format for 'short date' is set to display 3-letter months):

03-Sep-12 9:06:21.54 

Basically I want a solution that solves the issue regardless of what the clock format is set to.

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Edit: Since no one likes to read past the title, I will explicitly state this question is about a truncation issue. And I found a solution.

I've been using the following timestamp for a good while now, works well.

set timestamp=%DATE:/=-%_%TIME::=-% set timestamp=%timestamp: =% 

It produced a timestamp like: 18-03-2013_13-37-43.26, by replacing / and : in %TIME% and %DATE%, then stripping white space. The whitespace was the problem in my original question, really.

Answer 1

The first four lines of this code will give you reliable YY DD MM YYYY HH Min Sec variables in XP Pro and higher, using WMIC.

@echo off for /f "tokens=2 delims==" %%a in ('wmic OS Get localdatetime /value') do set "dt=%%a" set "YY=%dt:~2,2%" & set "YYYY=%dt:~0,4%" & set "MM=%dt:~4,2%" & set "DD=%dt:~6,2%" set "HH=%dt:~8,2%" & set "Min=%dt:~10,2%" & set "Sec=%dt:~12,2%"  set "datestamp=%YYYY%%MM%%DD%" & set "timestamp=%HH%%Min%%Sec%" set "fullstamp=%YYYY%-%MM%-%DD%_%HH%-%Min%-%Sec%" echo datestamp: "%datestamp%" echo timestamp: "%timestamp%" echo fullstamp: "%fullstamp%" pause 

Output example:

datestamp: "20200828" timestamp: "085513" fullstamp: "2020-08-28_08-55-13" Press any key to continue . . .