the date of earliest sunrise and latest sunset varies from location to location. see geography.about.com june 21st [ first day of summer]...then you start to lose daylight at the rate of 2-3 minutes per. the date of earliest sunrise and latest sunset varies from location to location.
Latency is important when someone is directly interacting with another computer, as the amount of lag between the two computers can make some tasks very difficult (such as editing a file). Bandwidth, on the other hand, is not concerned with latency. When downloading a large file, it may be perfectly acceptable to have a 3-4 second wait before the file begins to download. Networking latency is the time it takes for a single packet to go from your computer, to another host and back. Latency is generally measured in milliseconds.
I know people that run big simulations, in that case the lower latency RAM is worth it, because they aren't using the bandwidth and their data is all spread out over hundreds of gigs of RAM. For a regular desktop system low latency really doesn't matter since the data isn't spread out, it makes a difference but not enough for the price hike. I also have a strong suspicion that there's a problem with Ryzen and latency timings.