Btrieve Date Integer

this is my question:

I'm migrating data from a Btrieve file (.dat) through Pervasive Control Center and there is field type which is defined as integer but is a date and for example the date '31/12/2009' (seen in 开发者_StackOverflow中文版the legacy system) is view it as the number 733772 when I export it.

The legacy system shows the date correctly but I can't export it in the same format or at least I can't convert it. Does anybody know how to convert this number through Excel or something?

When I divided 733772 by 365.2425 (Number of days in year considering Leap year and 29 days of Feb - http://www.timeanddate.com/date/leapyear.html), it gave back 2009.

Go to format cells and changing category to date.