Write an AppleScript program to change date format for photos in Mac "Aperture"

I have about 30,000 photographs captioned and titled with keywords in Mac "Aperture" (Photo management App). It is running on my iMac. They currently have the dates in a format like this: Y2017, Feb, (I don't have an actual day included so it's only the year and the month). Clearly this is no good for sorting and i wish to change this date description to something like 2017-02, so that I can sort in a meaningful way on the year and month. (Some dates go back to 1800's). I need somebody to write me an AppleScript that I can apply to the photos that will make this change. I need it for both the "project" description and the metadata for the individual photos. I have attached some screenshots that shows the current situation. Note that keywords splits the entries into alphabetical order so Y2107 and Feb do not come together.

iPad iPhone マックOS Mobile App Development Objective C

プロジェクトID: #17115637

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