  We propose a distinction between two different concepts of time that play a
role in physics: geometric time and creative time. The former is the time of
deterministic physics and merely parametrizes a given evolution. The latter is
instead characterized by real change, i.e. novel information that gets created
when a non-necessary event becomes determined in a fundamentally
indeterministic physics. This allows us to give a naturalistic characterization
of the present as the moment that separates the potential future from the
determined past. We discuss how these two concepts find natural applications in
classical and intuitionistic mathematics, respectively, and in classical and
multivalued tensed logic, as well as how they relate to the well-known A- and
B-theories in the philosophy of time.
