For instance you can find out the day of the week you were born (your birthday or your friends). You can also figure out the day the baby will be born or when you'll get a job promotion.
You can find out the day when any event has happened in the past or will happen in the future or in the past.
Several other uses for this app might be: to calculate and organize yoursel for the day of credit maturity, the launch of product /car , the weekday film- theater show , musical concert, Christmas day, Easter and New Year, friends celebration, vacation / holiday start or any other other events.
You can also change the look / colors of the app in the right menu.