Thousands of Hungarians marched to the presidential palace late on Friday to protest against reforms to the labor code as a rally led by spoof political party MKKP merged with a subsequent demonstration staged by opposition groups.
Passage of two laws last week backed by Prime Minister Viktor Orban's Fidesz party angered a variety of groups.
One, dubbed by critics the "slave law," allows employers to ask staff to work up to 400 hours per year of overtime. Another would set up new courts which critics say could be politically manipulated.