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.
That's what the latency is all about. Latency is the number of clock cycles between making one request and the next request. Remember that latency numbers are clock cycles not time. So 2000 Mhz RAM with a latency of 10 has the same latency as 4000 Mhz RAM with a latency of 20, in both cases the latency is 5ns. There are a bunch of steps that have to happen in order to get data out of RAM.