Henna is used in marriages celebrations and it is used for traditions.Henna is usually popular for Hindus and Muslim in Pakistani or India. In Hindi/Gujarati (Hindu) and Muslim language it is call "mehndi"
After applying henna leave it on for about 4 to 6 hours and after you take it off don't wash your hand for 12 hours. Your hands will stink for a day or 2. If you leave it on longer the color will be more darker and prettier. The henna will stay 1 or 2 weeks because it depends on the color.