Re: Wrong Violation Code / Date on Citation
Yes you can fight it... I would highly doubt that the "time" error would make much of a difference (it will probably be considered a minor error) unless the officer testifies that it was daylight but even then, the statute itself does not differentiate between daytime or nigh time hours...
You do, however, have a pretty solid argument in that he cited you for the wrong CVC section, and therefore, that has hindered your ability to prepare a valid defense and you can move for a dismissal on those grounds. If you do go that route, I would refrain from mentioning CVC 24409 (if you figured which section you should have been cited for then you were able to develop whatever defense you could). It is not your burden to cite the correct CVC section, the officer should have written you up for the correct one.
Keep in mind that depending on when the citation was issued, and whether it has been filed in court or not, the mistake might be caught and if so, the officer can in fact mail you an amended copy of the citation and file the same in court. If that happens, then your "wrong CVC section" defense would not apply and you'd be better off developing the "opposing traffic/freeway center divider" argument... Although I am not sure how successful that might be.
I am right 97% of the time... Who cares about the other 4%!