PHP strtotime() Validator
II work with the PHP strtotime function all the time, and I often get frustrated because it won't accept date formats that I think it should accept. So rather than trying to test my formatting in the code, I just use this tool to make sure the format I have to work with will work properly within the function. Plug in your string, and if the RFC 2822 formatted date you end up with matches up with your string, then your format is valid.