In Spain it's called "jornada de reflexión" (deliberation day), and there also are Twitter accounts sneakily announcing surveys and provisional results.

Bosnia and Herzegovina has it as well. It is called "election silence" and functions in the same way parent comment describes.

I think the question was "do you have similar ways of circumventing 'election silence'" :) ?

It seems an inevitable collision of the election silence laws which were intended for broadcast media and party campaigns being applied to Internet social media.