将时间(从YYYY开始的天数)转换为可读的时间格式

I need help with converting time to a readable format. My time array (has 580 elements) is # of days since January 1st, 1900. How do I convert that to a normal time format (ie mm-dd-yyyy)?

例如,输入时间为43,887,输出应为02-27-2020。

谢谢!