limiting date_timezone.js to certain pages

I noticed that date_timezone.js is added to every page, is that really needed? It would be cool to have an option for only adding the JS to certain paths, something like the Lightbox module has for example. Or maybe only enabling it only for node/add and node/edit pages, can this be done? Thanks! I really dig the new features like default time and setting years forward and in advanced, great improvements.