Yes, Fritz, my answers were along this line of thought. Do look at Judy
Young's neat reply.
Thanks,
John
>
> Just imagining... I would say you could find out when
> it WAS, but it would be quite impossible the first try.
> When the shadow deviated to within about a week of
> when you guess it might occur, mark the line and
> then count the days until it returns, maybe say 16 or
> so. Then it OCCURRED 8 days ago. Now next year
> it will be 8 days after your mark.
>
> Let us know if there are other ways than this.
