duration of the day over year in Las Vegas

Continuing my previous posts on the Analemma, one can calculate the rising and setting times here in Las Vegas, NV. From there, the duration is simply the difference from setting and rising. I am acutely aware of the functioning of our air conditioner because it was 115F -- hot and dry -- today. From the graph, I can see that this month -- July -- may be the most difficult month. Hopefully, August should be cooler. The day's length this month is over 14.5 hours, while August goes to 14 hours. The power did snap off for a few minutes this afternoon. I lost all power, and with it the internet and wifi. It came back soon thereafter. The LIFX lightbulb had some difficulty with the hard stop. By December, we have less than 10 hours sunlight.

Day light savings give the day rise and set lines a jagged edge in March and November. 

This project is available under GNU GPL at https://github.com/str255/sun-mc
For your location edit the example parameters in equation_of_time.mc.