Use the number of seconds since the epoch (Jan 1 1970 UTC) instead of an ISO-formatted datetime string. This is easier for credit providers to parse.
Open edX -------- This is the root package for Open edX. The intent is that all importable code from Open edX will eventually live here, including the code in the lms, cms, and common directories. Note: for now the code is not structured like this, and hence legacy code will continue to live in a number of different packages. All new code should be created in this package, and the legacy code will be moved here gradually.