Oranjegekte or Oranjekoorts (Orange fever) is a phenomenon in the Netherlands that occurs during Queen's Day

Koninginnedag

Koninginnedag or Queen's Day is a national holiday in the Kingdom of the Netherlands. Celebrated on 30 April , Koninginnedag is Queen Beatrix's official birthday. Though Queen Beatrix was born on 31 January, the holiday is observed on 30 April as it was the birthday of her mother and...

, international football (soccer) championships, and other major international sporting events. The event manifests itself in wearing orange clothing such as T-shirts (mostly football-shirts), caps and scarfs, painting ones hair orange and decorating of rooms, houses and even entire streets with orange decorative objects.

The event is highly valuable to commerce as large profits can be made selling orange products. Many companies introduce special orange editions of their regular products. Commercials tend to respond well to this and especially during World Championships

FIFA World Cup

The FIFA World Cup, often simply the World Cup, is an international association football competition contested by the senior men's national teams of the members of Fédération Internationale de Football Association , the sport's global governing body...

 a lot of commercials refer to the event.

A lot of brands also introduce special goodies during these events. Mostly beer brands and supermarkets. Examples of these items are the Heineken hats and Albert Heijn's Wuppies, Welpies and Beesies.

Many artists produce special songs around the time of the European and World Championships that refer to the Dutch National Footbalteam

Netherlands national football team

The Netherlands National Football Team represents the Netherlands in association football and is controlled by the Royal Dutch Football Association , the governing body for football in the Netherlands...

, which is most often called Oranje (Orange). Most of these songs have no particular meaning other than encouraging the team or the festivities.

Orange is the symbolic colour of the Dutch royal family, the House of Orange-Nassau

House of Orange-Nassau

The House of Orange-Nassau , a branch of the European House of Nassau, has played a central role in the political life of the Netherlands — and at times in Europe — since William I of Orange organized the Dutch revolt against Spanish rule, which after the Eighty Years' War...

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