I also adopted the yyyy-mm-dd format, some time in the 90's. I later moved from Australia (dd-mm-yyyy) to the US (mm-dd-yyyy) and continued to use yyyy-mm-dd du

I also adopted the yyyy-mm-dd format, some time in the 90's. I later moved from Australia (dd-mm-yyyy) to the US (mm-dd-yyyy) and continued to use yyyy-mm-dd during my time there. I believe yyyy-mm-dd is the usual format in Japan, but I'm amazed that it hasn't seen more popular adoption worldwide, given the difficulties it solves.