The World Vitiligo Day is an annual celebration held on which day of the year ........

Explanation:

• The World Vitiligo Day is observed on June 25 to build global awareness about vitiligo.
• Vitiligo is a skin disorder leading to loss of color in the skin creating a variety of patterns on the skin from loss of pigment.
• Vitiligo is often called a disease instead of a disorder and that can have a significantly negative social or psychological impact on patients.