Why do my Apache logs show two timezones

Question

Dates from my apache log are correct(ish) but in two different time zones.

For example...

10.3.1.1 - - [26/Jan/2011:10:57:34 +0200] "GET /html/js/jquery/jquery.bidi.js HTTP/1.1" 200 4328 "http://dhl-translation.accountis.net/" "Mozilla/4.0 (compatible; MSIE 6.0; PPP v5.1 (1,1,1); Windows NT 5.1; SV1; .NET CLR 1.1.4322; .NET CLR 2.0.50727; .NET CLR 3.0.4506.2152; .NET CLR 3.5.30729)"
10.3.1.1 - - [26/Jan/2011:08:57:34 +0000] "GET /html/images/logo.png HTTP/1.1" 200 686 "http://dhl-translation.accountis.net/" "Mozilla/4.0 (compatible; MSIE 6.0; PPP v5.1 (1,1,1); Windows NT 5.1; SV1; .NET CLR 1.1.4322; .NET CLR 2.0.50727; .NET CLR 3.0.4506.2152; .NET CLR 3.5.30729)"

Any ideas on the cause of this and how to fix it?

Solution

Another process is interfering with your timezone settings.

There's a pretty concise answer to this at "what could cause Apache's time/timezone to change intermittently?". This can be particularly painful with Django -- as it doesn't handle juggling timezones very well -- and as such there are some good explanations in some Django-specific questions: Django timezone confusion and Django timezone mess

The solution, in short, is to normalise your timezone settings. Ideally, use something like UTC for both server and applications.