Tsv table has some dates being expressed with pound-sign

For an internal database I'm building, I have a开发者_如何学C sqlite database, and I want to use python to export it into a tsv file. The current problem is that some of my dates are being replaced with '######', and when double-clicked, become actual dates. Could somebody please help?

Note: Nothing else changes, including type (they're both date, as excel 2007 indicates).

If anyone wants to see the python source code, please comment, but I don't currently see a reason as to why I need to post it.

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you mean the #### appear in Excel?

This is a common issue: when Excel cannot display the whole value of a cell, it displays ### until it can show the whole value. This is display only.

STFW for more explanation.