Victor, I have completely lost track of the details of this discussion. Could you (with help from others who contributed) try to compile a table showing, for each platform (Windows/Mac/Linux/BSD) which clocks (or variations) we are considering, and for each of those: - a link for the reference documentation - what their typical accuracy is (barring jumps) - what they do when the "civil" time is made to jump (forward or back) by the user - how they are affected by small tweaks to the civil time by NTP - what they do if the system is suspended and resumed - whether they can be shared between processes running on the same machine - whether they may fail or be unsupported under some circumstances I have a feeling that if I saw such a table it would be much easier to decide. I assume much of this has already been said at one point in this thread, but it's impossible to have an overview at the moment. If someone has more questions they'd like to see answered please add to the list. -- --Guido van Rossum (python.org/~guido)