Last modified: 2013-07-25 09:00:24 UTC
An entry there says "00:00, 1 January 1970, Liangent got edits for Liangent (Talk | contribs | block)", where the comma is fetched from the message comma-separator. However this message is for a comma where it's used as a separator ([[Comma#In_lists]]) but now it's not used for this and in some languages (such as zh) a different punctuation nedd to be used.
Furthermore this is like some lego work. Maybe that date should be included in the message checkuser-log-useredits?
Submitted as gerrit change Ife21fd09aa6d0c74241dbd7b9130b10292f306ac