I wrapped Bastien's functions below in a simple macro, which IMO results in a very nice way to handle time values in Org-mode tables as in the attached org file (below). Note, the first argument to the `with-time' macro controls whether results are returned as a time string or a numerical value. That argument may be followed by any number of (possibly nested) expressions. If this looks to be generally useful I'd be happy to post it to worg. Best -- Eric