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.
Latency can be reduced between the trading tool (event occurrence) and order generation can be reduced to achieve better efficiency. This can be done by reducing the latency to the order of milliseconds and lower. Risk management has to be implemented in real-time without human intervention. Why is low latency that important in the first place? To answer this question, think of trading as a running race. Faster the speed than your competitors, better your chances of winning. The objective in trading is trade execution at a competitive price. It is desirable to improve latency to stop getting picked by competitors. Correct technology has to be implemented to reduce latency as low latency systems cost a lot.