National Nail Polish Day is celebrated on June 1 and is particularly popular among women who enjoy adding color to their nails. Initiated by the nail polish brand Essie, the day aims to celebrate the vast array of nail polish shades available and to promote nail care. The event has evolved to include various brands offering special discounts and promotions. Participants are encouraged to share photos of their painted nails on social media, often using the hashtag #EssieLove, which was part of the initial marketing strategy that helped boost Essie's sales. Celebrating this day typically involves activities like getting manicures and pedicures, making it a festive occasion for nail polish enthusiasts in the United States.