Vyshyvanka Day is celebrated on the third Thursday of May. It is intended to unite all Ukrainians over the world, regardless of religion, language they speak or their place of residence. It is a flash mob holiday, which is not attached to any public holiday or feast day.
Vyshyvanka is used as a talisman to protect the person wearing it and to tell a story. Embroidery was used in vulnerable places on the garment where evil spirits could potentially enter the body: along the neckline, cuffs, shoulders, back and hem (c) Wiki