Edinburgh International Science Festival
Date: April 6-18.
Location: Edinburgh.
Description: World's oldest and biggest celebration of science and technology, with more than 300 events held everywhere from art galleries to laboratories.
Contact: 0131-530 2001
Website: www.whatsonwhen.com/pages/edinburgh.jml

Salzburg Easter Festival
Date: April 7-16.
Location: Grosses Festspielhaus and Mozarteum, Salzburg, Austria.
Description: The Berlin Philharmonic Orchestra's annual Easter festival, this year including Verdi's Falstaff directed by Declan Donnellan of Cheek By Jowl fame.
Contact: +43 662 8045 579
Website: www.whatsonwhen.com/pages/classicalmusic.jml

The World Series of Poker
Date: April 16- May 18.
Location: Binion's Horseshoe, Las Vegas, Nevada.
Description: The biggest poker game in the world. The minimum stake is $10,000, the final jackpot of more than $1 million.
Contact: +1 702 382 1600
Website: www.whatsonwhen.com/pages/usa.jml

Holy Week in Mexico
Date: April 1-15.
Location: San Miguel de Allende, Guanajuato, Mexico.
Description: This stunning colonial town, a short hop from Mexico City, celebrates the Passion of Christ with processions of Roman centurions, the blowing up of a papier mché Judas and a pageant in which Jesus' carrying of the cross to Calvary is re-enacted.
Contact: 020-7488 9392
Website: www.whatsonwhen.com/pages/central_america.jml