What indicates an Office Open XML Cell contains a Date/Time value?

Question

I\'m reading an .xlsx file using the Office Open XML SDK and am confused about reading Date/Time values. One of my spreadsheets has this markup (generated by Excel 2010)

Answer 1

In styles.xml see if there is a numFmt node. I think that will hold a numFmtId of "9" which will relate to the date format that's used.

I don't know where that is in the ECMA, but if you search for numFmt, you might find it.