Happy Spring Equinox! (or Fall Equinox if you’re south of the equator)
The 0.4% variance is because the sunrise and sunset in webCoRE rounds to the nearest minute. My next project with this is to incorporate the precise second available in the new $twcweather.
$twcweather.conditions.sunriseTimeLocal >>> "2018-12-19T07:28:58-0500" $twcweather.conditions.sunsetTimeLocal >>> "2018-12-19T17:10:52-0500"
Once this new data has been implemented, my dial should be spot on.