Fdate Home Page: This is a ridiculously handy tool when you’re working with DOS batch files. I have never seen something with so many configuration options. This EXE can calculate and output a date any way and in any format (and any language) you can think of.
Fdate is a utility for doing date formatting and date arithmetic in MS-DOS batch files. It runs under MS-DOS and Windows. Fdate’s output can be placed into an environment variable that can be used in a batch file in whatever way is useful to you.
I only use it to auto-name backup files, which is almost condescending for a program put together this well. The level of documentation on it is really commendable.