Every year on May 25th, World Thyroid Day highlights this important gland in the body that causes widespread disease across the globe. The day also educates the public on the role of the thyroid in their overall health. The thyroid is a small gland located at the base of the neck. This butterfly-shaped gland produces two hormones: triiodothyronine (T3) and thyroxine (T4). Although the thyroid is a tiny gland, it plays a huge role in one’s health.