Convert the FULL Excel date serial format to Unix timestamp
问题 I've seen lots of references to converting the "date" portion of the Excel serial date format, but everyone seems to skip the "time" portion of it. Here is what I need to do: I have an Excel file I'm importing. PHP in use. I am encountering the Excel Date Serial format (dddddd.tttttt) and need to convert this to an entire Unix timestamp. I've tried a few different things, but am getting hung up on how to do this in a fluid motion. 回答1: Please use this formula to change from Excel date to Unix