A timestamp format like “DDD MMM DD HH:MM:SS YYYY” should be regarded either a bad joke or a criminal offense. Who wrote that monstrous “program”? Did he manage to get that program doing anything in a reasonable way?
And now we get that question giving exactly one example, and this eaxmple is based on exactly the one month for which the month-formats MMM and MMMM don’t make a difference.
Can I believe that at least a format was chosen resulting in a constant length of all the stamps?
Suppose the import format is actually described by
DDD MMM DD HH:MM:SS YYYY and an imported DTS is placed in cell A2 you will get a date-time-stamp in the numeric representation used by spreadsheets by the simple formula:
You should format the result by
YYYY-MM-DD HH:MM:SS to get an unambiguos display.