Is there an &quot;official time&quot; in the EU, and if so, which is it?
<p>With regard to the Brexit today, I was asking myself when exactly it goes into effect. It should be 31st January, 2020, 23:59:59, but which time zone?</p>

<p>This leads me to the question, if there is an official - or default - time zone in the EU or even worldwide when a contract states a start or end date?</p>

<p>Is it undefined unless the contract specifies it?</p>

<p>P.S.: Not sure if this is more a political question..?</p>

<p>Different countries are in different time zones. (Some even extend over multiple time zones, but none of the current EU states do). When it is important and not obvious, you specify the time zone. </p>

<p>Brexit is at 11pm in the U.K., midnight in Germany, France, Netherlands and many others, and probably 1am on Feb 1st in Greece. </p>

<p>For local situations, it will be the local time zone. If there’s a contract between a company and a customer in New York to do something at 3pm, with nothing else specified, nobody will get away with saying they meant Pacific Time. </p>

contract-law international