Intocht van Sinterklaas in Schiedam 2009

Sinterklaas [sɪntər'klaːs] (or more formally Sint Nicolaas or Sint Nikolaas; Saint Nicolas in French; Sankt Nikolaus in German) is a traditional winter holiday figure still celebrated today in the Low Countries, including the Netherlands, Belgium and Luxembourg, as well as some parts of Germany, French Flanders, Lorraine and Artois. He is also well known in territories of the former Dutch Empire, including Aruba, Suriname, Curaçao, Bonaire, and Indonesia. He is one of the sources of the holiday figure of Santa Claus in North America.

Although he is usually referred to as Sinterklaas, he is also known as De Goedheiligman (The Good Holy Man), Sint Nicolaas [sɪnt 'nikolaːs] [ pronunciation (help·info)] (Saint Nicholas) or simply as De Sint (The Saint).

He is celebrated annually on Saint Nicholas' eve (5 December) in the Netherlands and on the morning of 6 December in the other countries. Originally, the feast celebrates the name day of Saint Nicholas – patron saint of children, sailors, philatelists, and the city of Amsterdam, among others. Sint Nicholas being a bishop and this geographical spread make clear that the feast in this form has a Roman Catholic background, although the papacy has never officially recognized his existence.

Closely related figures are also known in German-speaking Europe and territories historically influenced by German culture, including: Switzerland (Samichlaus), Germany and Austria (Sankt Nikolaus); the region of South Tyrol in Italy; Nord-Pas de Calais, Alsace and Lorraine in France – as well as in Luxembourg (De Kleeschen), parts of Central Europe and the Balkans.

Saint Nicholas (Greek: Ἅγιος Νικόλαος, Hagios Nikólaos; Latin: Sanctus Nicolaus) (15 March 270 – 6 December 343), also called Nikolaos of Myra, was a historic 4th-century saint and Greek Bishop of Myra (Demre, part of modern-day Turkey) in Lycia. Because of the many miracles attributed to his intercession, he is also known as Nikolaos the Wonderworker (Νικόλαος ὁ Θαυματουργός, Nikolaos ho Thaumatourgos). He had a reputation for secret gift-giving, such as putting coins in the shoes of those who left them out for him, and thus became the model for Santa Claus, whose modern name comes from the Dutch Sinterklaas, itself from a series of elisions and corruptions of the transliteration of "Saint Nikolaos". His reputation evolved among the faithful, as was common for early Christian saints. In 1087, part of the relics (about half of the bones) were furtively translated to Bari, in southeastern Italy; for this reason, he is also known as Nikolaos of Bari. The remaining bones were taken to Venice in 1100. His feast day is the 6th of December.