Above is a little illustration that depicts the sunrise and sunset times (listed on the y-axis) of two locations in the world for each day in the year (spread across the x-axis).
See the code and web version here (press the play button – not optimized for mobile).
In this current case it is the 2016 sunrises and sunsets from Eastern Standard Time (EST) – aka New York – and Central European Time (namely Switzerland & France).
At many stages in my life, for different reasons, I have found myself doing a mental calculation to imagine this time difference, and specifically when our normal waking hours overlap.
These days, both a friend and my girlfriend’s father are stationed in Switzerland.
This illustration is designed to show that our days share a lot of the same sunlight – especially in the summer. So even if we are far away, we can often look up at the same thing in the sky. ?