Looks like we created two issues: #6876 (Camillo) and #6877 (me). Joe Rickerby wrote

I'd be very happy if hour just returned the same as hours.

I already provided a fix with a test case specific to the problem with #hour, see the changeset at (was not able to upload a slice for whatever reason). Details in https://code.google.com/p/pharo/issues/detail?id=6877 It will come with one of the next updates. If you need it now just file in the changeset. Since the same problem is for other messages like #week too we should keep the other issue #6876 from Camillo open https://code.google.com/p/pharo/issues/detail?id=6876 until we have time to fix this as well. Bye T.