This is probably obvious to you math wizzes, but as we move along and start getting closer to our range of years, be careful to only add or subtract 24 from one endpoint to find your other endpoint.
For example if you think your high year might be 1985, it would be easy to think your low year would be 1960, since 85-25=60.
But no!! Your early endpoint would be 1961, because you have to count both endpoint years. The old "fencepost" problem.
