Girls' Day means everyday is a new day for Girls' Day music . Girls' Day is a new KPOP Girl group created by SM Entertainment . These girls are really adorable, and they have great skills . Indivualy, they are unique and special .But together, They are a really special and great KPOP girl group . SME just had an interview regarding Girls' Day's debut on 11 March . Lee Soo Man said that they are going to be debuting on 28 March at Music Core @ 7.00pm where the monthly contest will be held .