XLSX Excel Spreadsheets are different than the XLS version in that they use the Microsoft Office Open XML format. The Open XML format makes it easy for other programs, such as OpenOffice.org, to read XLSX files (and other Open XML file types). The Open XML format was introduced with Microsoft Office 2007.
It was first published anonymously in Paris in 1697 in Histoires ou contes du temps passe (PassÃ©: English stories Or tales Of Past), times a collection of eight fairy tales By. perrault
In Ever After, it was the 16th century, but most of the recent/classical Cinderella stories are based on Charles Perrault tale made in 1697. Since Cinderella was 19 during her story you can say her B-day is September 6, 1678 if you want. Written Oct 7, 2015.