Daylight Savings Time begins on Sunday, March 10, 2013, which is day three of the NBIN. At 2:00a.m. Eastern Standard Time (EST) on Sunday, the clocks get moved forward one hour and the time becomes 3:00a.m. Eastern Daylight Savings Time (EDT). Please plan ahead so that you will be on time for your NBIN event and for your travel plans that day. Please be aware that some cell phones do not change automatically until they are powered down and restarted. A wake up call from your hotel is the safest way to know you are waking up on time.
For some history on why Daylight Savings Time exists visit: National Geographic Article.