Hi Colin, welcome to the forum.
If I understood correctly, you want to write a file with date time stamp in the 1st line?
If so, you can use the File Write task. In there use the Date variabeles and choose a right format, e.g.: {DATEFORMAT(M/d/yyyy h:mm tt)}
If you place this in the file write task, and run your task, the current date and time will be in the file.
Regards
Erik
Uses Visualcron since 2006.