The ErrorLogFormat directive allows to log records with a format, that comes close to the Internet date/time format: ISO 8601 date + time without time zone Format string: %{cu}t Example timestamp: 2014-12-10 19:05:38.192439 (Details: http://httpd.apache.org/docs/current/en/mod/core.html#errorlogformat http://en.wikipedia.org/wiki/ISO_8601) This however is not enough if you are operating internationally and need to login in full Internet date/time format: Example timestamp: 2014-12-10T19:05:38.192439+01:00 (Details: https://tools.ietf.org/html/rfc3339#section-5.8) Actually, ISO 8601 specifies everything that is required, but the current httpd simply doesn't implement a timestamp that matches Wikipedias documentation: Combined date and time in UTC: 2014-12-10T17:05:33+00:00 or 2014-12-10T17:05:33Z I would be totally satisfied if Apache would at least support logging with a UTC timestamp: Example timestamp: 2014-12-10T18:05:38.192439Z ErrorLogFormat doesn't (yet) come with the %{format}t format string to be more flexible in specifying the format. (Details: http://httpd.apache.org/docs/current/mod/mod_log_config.html)
Actually, the current format isn't proper ISO 8601 because the 'T' separator is missing. For those who operate internationally shall use 'Etc/UTC' on their servers, thus making the TZ offset redundant.
Definitely a most have! Make log centralization more complicated.