back to the future .. help on history

An unlucky "date" command on the hobbit server has changed the time from jan 12 to nov 1 for about 10/15 minutes :( Now almost all histories look like this:

Mon Jan 29 00:09:59 2007 green 10:32:48 Sun Jan 28 23:55:01 2007 red 0:14:58 Wed Nov 01 00:00:32 2006 green 88 days 23:54:29 Wed Nov 01 00:00:17 2006 purple 0:00:15 Fri Jan 12 11:21:29 2007 green none Fri Jan 12 09:55:20 2007 red 1:26:09

is there a way to clean the history removing the wrong "Nov 01" lines? thank you

Gianluca