database restoration problem- data became incorrect caused by incorrect date in the server

Hi all

I am a junior DBA:

Please give an advice on how I should solve the following problem,

We are still using 7.3.4 PostgreSQL but will be upgrading very soon, database is running on CentOS 5 O/S .

Problem: - it's about the wrong data in the system:

Everything was fine until a certain process(for financial period processing) that normally generates many transactions in the database took place when the server lost the date. The date changed from 07-04-2010 to 15-08-2003...hence the process ran until it finished which leaded to the generation of the wrong data.

When we thought of restoring from a successful dump file(backup file) for the 07-04-2010 so that we could restore it to have everything before the date changed, we were not lucky because the only latest successful dump file was on the 03/04/2010.

Question:
How can we removed everything that got processed on the wrong date and have everything restored so that it's in the correct state as at 07/04/2010... I tried to search for a solution but I can't find anything.

Your help would be much appreciated

Thanks
Khangelani

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