- Thu, 01 Jan 1970 00:00:00 GMT
- 00:33, 1 January 1970
- 31 December 1969
- or something similar (depends on locale you use)
Solution: In your SQL db for your wiki look for the table called yourdbprefix_revision in that table find the column rev_timestamp and check its datatype, if it's set to anything less then VarChar(14) change it (to "VarChar(14)") and save the changes. Now when you edit a page the revision will show the correct date.
Special thanks to krikit.