Astronomy and my Dad

I used to own a big and heavy 10″ relfecting telescope that was 4′ long mounted on a heavy EQ mount.   I used to love to bring it with me when I visited my parents house outside Cincinnati.    On one visit my dad told me he and a neighbor where keeping notes on sunrises and sunsets.   Today, January 4 has the latest sunrise of the year.    A few years later my mom and dad took an astronomy class design for seniors in Arizona (my dad was 84 at the time).   This is his chart.

Latest sunrise is not December 21