Jan 1: New Year’s Day Belgium & Netherlands
Feb: Carnival (Mardi Gras) Belgium & Netherlands
March 24-May 20: Spring Flower Show (huge gardens in bloom) Keukenhof Gardens (near Lisse, Netherlands)
April 16: Bloemencorso (25-mile flower parade) Noordwijk to Haarlem, Neth.
April 24-25: Easter Sunday and Monday Belgium & Netherlands
April 30: Queen’s Day (street fairs, parades, fireworks) Netherlands

May 1: Labor Day (some closures) Belgium & Netherlands
May 4: Remembrance of World War II Dead (Dodenherdenking) Netherlands
May 5: Liberation Day (Bevrijdingsdag) Netherlands
May 11-15: Art Amsterdam (contemporary art exhibition) Amsterdam
June 2: Ascension Day (closures) Belgium & Netherlands
June 2: Procession of the Holy Blood (religious procession) Bruges, Belgium
June 3-18: Holland Arts Festival (concerts, theater, music ) Amsterdam
June 12-13: Pentecost and Whit Monday (closures) Belgium & Netherlands
June 17: Grachtenloop (run around canals) Haarlem, Netherlands
June 23-25: Amsterdam Roots Festival (ethnic food, music, world culture) Oosterpark, Amsterdam
July 5 & 7: Ommegang Pageant (historic costumed parade to Grand Place) Brussels
July 8-10: North Sea Jazz Festival Rotterdam, Netherlands
July 21: Independence Day (parades, fireworks) Belgium
Aug: Reiefeesten (open-air spectacle on canals held every three years) Bruges
Early-mid-Aug: Pluk de Nacht (outdoor film festival) Amsterdam
Aug 5-7: Gay Pride Weekend Amsterdam
Aug 12-21: Prinsengracht Canal Festival (music and other festivities) Amsterdam
Aug 13-15: Carpet of Flowers (held only in even years, next one in 2012) Brussels
Aug 15: Feast of the Assumption (closures) Belgium
Sept (first week): Flower parade on canals Aalsmeer to Amsterdam, Netherlands
Sept 16-18: Jordaan Festival (neighborhood street party) Amsterdam, Netherlands
Oct 8: Yom Kippur (some closures) Netherlands
Nov 1: All Saints’ Day Belgium
Nov 11: Armistice Day (banks closed) Belgium
Mid-Nov: Sinterklaas ("Santa Claus") Procession Amsterdam
Late Nov-early Jan: "Winter Wonders" Christmas Market Brussels
Dec 5: St. Nicholas’ Eve (Sinterklaasavond; presents for children) Belgium & Netherlands
Dec 25: Christmas Belgium & Netherlands
Dec 26: "Second Day" of Christmas (Tweede Kerstdag) Netherlands
Rick Steves / Expatica