The Celebi event will most likely run from Feb 27th to March 5th. The March 7th date circulating on the Net is because that is the date programmed into the event cartridge. The reason it will probably end earlier is because the programmed end dates for the Johto trio is 1 day later than Nintendo advertised and Pokemon Black and White release on March 6th. The B/W release is a factor because Nintendo has ended events 1 day prior to a new game release in the past (TRU Regigigas and Platinum, GAMESTP Jirachi and HG/SS). Feb 27th should be the start date, since the Celebi's trainer ID is 02271.