When and why was st nicholas canonized?

St. Nicholas was canonized as a saint in the early Christian church, although the exact date is not clearly documented. He is believed to have died around 343 AD and became widely venerated for his generosity and miracles attributed to him, particularly his acts of kindness towards children and the needy. His legacy grew over the centuries, leading to his recognition as a saint by the Catholic Church, with his feast day celebrated on December 6.