I just verified on Mac machine and I can see modified date as well. Could you please provide following information,
Also it may possible that settings on your Windows machine is not set up as to show detailed information about file. Could you go through the following article and make sure details information is active on Windows
Thanks. I found only the ai document file has different menu in which the "date" shown there. All the others is default to be "date modified". It is now ok after changing "date" to "date modified".