[tantalor]

I don't think "2012-02-03 09:30:00+0100" is valid ISO 8601 because of the space; it should be a "T" to be a proper "combined date and time" representation.

The date and time representations may appear in proximity to each other, often separated by a space or sometimes by other characters. In these cases they occupy two separate fields in a data system, rather than a single combined representation. This is usually done for human readability. Unlike the previous examples, "2007-04-05 14:30" is considered two separate, but acceptable, representations—one for date and the other for time. It is then left to the reader to interpret the two separate representations as meaning a single time point based on the context.

http://en.wikipedia.org/wiki/ISO_8601

That said, I prefer the "separated date and time" representation myself.