I was trying to find something to illustrate the practical implications of this, but couldn't find exactly what I wanted so came up with this:

I was trying to find something to illustrate the practical implications of this, but couldn't find exactly what I wanted so came up with this: Toronto San Francisco Sunrise Sunset Sunrise Sunset June 21 (DST) 5:00~5:36 am 9:02~9:38 pm 5:16~5:48 am 8:34~9:06 pm December 21 7:15~7:47 am 4:43~5:16 pm 6:52~7:21 am 4:54~5:23 pm December 21 (DST) 8:15~8:47 am 5:43~6:16 pm 7:52~8:21 am 5:54~6:23 pm The ranges are for civil twilight [1] which is basically the time it's still bright enough to see outside. [1] https://www.timeanddate.com/astronomy/civil-twilight.html https://www.timeanddate.com/astronomy/civil-twilight.html