Windows batch file check time and date then rename [closed] - date

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I need to rename todays date paymentpagecalls20200128.txt and WithdrawalConfirm20200128.txt to paymentpagecalls20200129_*time*.txtand WithdrawalConfirm20200129_*time*.txt when it is every 8 hours or if possible 12:00am/6:00am/10:00PM.
I have this code to get my time ( just copied it to some of my searched )
set "destination=C:\Users\JBP-Admin\Desktop\Pugad\Forback_UP\Destination"
set day=0
echo >"%temp%\%~n0.vbs" s=DateAdd("d",%day%,now) : d=weekday(s)
echo>>"%temp%\%~n0.vbs" WScript.Echo year(s)^& right(100+month(s),2)^& right(100+day(s),2)
for /f %%a in ('cscript /nologo "%temp%\%~n0.vbs"') do set "result=%%a"
del "%temp%\%~n0.vbs"
set "YYYY=%result:~0,4%"
set "MM=%result:~4,2%"
set "DD=%result:~6,2%"
set "result=%yyyy%%mm%%dd%"
echo %result%
for /r "C:\Users\JBP-Admin\Desktop\Pugad\For Rename" %%G in (*%result%.txt) do (
ren "%%~fG" "C:\Users\JBP-Admin\Desktop\Pugad\For Rename"
if exist "C:\Users\JBP-Admin\Desktop\Pugad\For Rename%%~nxG" (
echo File "%%~fG" renamed successfully.
) else (
echo File "%%~fG" renamed failed.
)
)
pause
how can I insert the part to check the time then rename it?

Answer 1

Break down of what's happening
Retreive all .txt files from said directory that match given criteria
We parse the filenames and extract the existing date and append the new date
Rename the file(s)
The output of this which is an ".exe" can be scheduled in task
scheduler to executed at given interval based on given condition.
Go to TaskScheduler > Action > Create Basic Task > Set Trigger, Action > Finish
using System;
using System.IO;
using System.Linq;
namespace Test
{
public class Program
{
static void Main(string[] args)
{
string FolderPath = #"C:\Users\John\Documents";
DirectoryInfo di = new DirectoryInfo(FolderPath);
var files = di.EnumerateFiles("*.txt")
.Where(s => s.Name.Contains("Withdrawal")
|| s.Name.Contains("payment")).ToList();
var Currentfile1 = files[0].FullName;
var Currentfile2 = files[1].FullName;
//Parsing files
var Newfile1 = Currentfile1.Substring(0, Currentfile1.Length - 2);
var Newfile2 = Currentfile2.Substring(0, Currentfile2.Length - 2);
// Append new date
Newfile1 = Newfile1 + DateTime.Now.ToString("yyyyMMdd") + ".txt";
Newfile2 = Newfile2 + DateTime.Now.ToString("yyyyMMdd") + ".txt";
//Rename
File.Move(Currentfile1, Newfile1);
File.Move(Currentfile2, Newfile2);
}
}
}