So, obviously a neck date, while being helpful in providing a date range of production, cannot be a definitive reference.
While there have been periods where dramatic changes have occurred, for example: the transition periods between Leo's Fender and the CBS years, as well as the transition between CBS' Fender and the current ownership, generally speaking, most models are feature specific and do not change from year to year..
This chart contains If you are unable to place the approximate year of manufacture of your instrument using the above charts, there are a few great books available, which have invaluable information on the history of Fender instruments.
If you have serious interest in learning about the history of Fender instruments, or if you just want to try to establish the year of production of your own axe, we would highly recommend that you pick up one or more of the following books.
The only way to try to narrow the date range of your specific instrument would be to remove the neck and check the butt end of the heel of the neck for a production date, which may be stamped or written there.