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.