title: Why do some applications ask the user if they follow daylight saving time?
body: <p>After allowing the user to select their timezone many applications ask if the DST adjustment should be made. Given resources like the <a href="http://en.m.wikipedia.org/wiki/Tz_database" rel="nofollow">tz database</a> which contain past and present information on DST observances for each timezone, why do applications ask?</p>