Draw a timestamp on your time-lapse
Software requirements: Windows, Python, PIL, (Aggdraw)
To run python scripts, you need to have Python installed. To be able to draw on photos, you also need the Python Imaging Library (PIL) which is only available for Windows. For drawing a nice anti-aliased clock you also need Aggdraw. Make sure all packages have the same version number, eg. 2.6.
Now you need a script which opens each photo, take the EXIF date/time information and draw it on the photo. Below are two scripts you can use. Save it as a .py file and put it in a folder with .jpg files. Click on the .py file and the script should run. Done! Your images are now saved in a new subfolder.