Passover this year (2014) begins at sunset Monday, April 14, 2014 and ends at nightfall Tuesday, April 22, 2014.
In Israel, Passover will continue for 7 days until Monday, the 21st of April.
In the USA, Passover ends one day later, so in 2014, Passover will end on Tuesday, the 22nd of April.
The first day of Passover is Tuesday, April 15, 2014. However, in the Jewish calander, a holiday begins on the sunset of the previous day, so observing Jews will celebrate Passover on the sunset of Monday, the 14th of April.