The new constitution of Hungary—called the Fundamental Law of Hungary—became effective a couple of days ago on January 1, 2012. The day after its coming into force, thousands of Hungarians gathered in Budapest to protest the nation's new constitution. Analyses of the day's events are available here, here and here. Princeton's Kim Lane Scheppele is quoted offering some noteworthy observations near the end this article here.
The Hungarian Parliament adopted the new constitution on April 25, 2011. The full text is available here.