This is a little program that prints a series of dates to standard output. The name is short for "date picker". You also get a sophisticated filtering mechanism to remove dates you do not want to see.
To show each day next month that is a Tuesday:
dapi --weekday '==' tue 'next month'
Plenty of examples are in the manpage.
Github page - full source available here.
License - there is NO WARRANTY of any kind
Haskell Hackage page
Get the Glasgow Haskell Compiler and cabal install working (too much to explain here, sorry) and then run "cabal install dapi".
Or, if you know Haskell, you know the other ways you can do this.
Please report any bugs, ideas, appreciation, or flames to firstname.lastname@example.org or use Github.