如何将像dd-mm-yyyy这样的日期转换为ISO日期格式，以便存储在mongoDB中

In my mean stack app, i have data on a date basis. In angular side, i used a date picker to get/set the date that the read/write of Data to be handled. The date picker produce date of the form "dd-mm-yyyy". What is the easiest way to convert this into mongodb understandable format, and back.In my mean stack app, i have data on a date bas