pydata/pandas — pull request #9175 by jmcnamara (2014-12-31 03:04:58+00:00)
Title: BUG: Fix for Timestamp handling in xlwt and xlsxwriter engines.

Fix for writing Timestamp objects using the xlwt and xlsxwriter
engines. Both modules write Excel dates and times using
datetime.timedelta which differs from pandas.Timedelta. This
fix coerces Timestamp objects to datetime objects.

Issue #9139.