If you press F5 in notepad, it will insert current date and time in the file. I think most of us know about this notepad trick. It is also mentioned in the Edit menu of the notepad.
Notepad isn't really that bad. It also has a few tricks. For instance, if you want to insert the time and date, simply hit F5. Or, if you want to "log" the times you edit a particular text file, be sure to type: ".LOG" (without the quotes) as the first line of that file and save it. Now every time you open it up, the current date and time will be automatically stamped into it.