The [file->modificationTime] method returns the date and time when the file was last modified.
local(f) = file(...) #f->modificationTime
The code below displays the date and time the file was last modified in the standard USA format of mm/dd/yyyy hh:mm:ss.
local(styles) = file('/css/style.css') date(#styles->modificationTime)->format('%-D %r')
12/2/2010 11:04:15 PM
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