ATHENS, Greece — Tens of thousands of demonstrators flooded the streets of Athens on Tuesday as Greece’s labor unions organized the country’s second general strike this month to oppose a contentious new labor law. The 24-hour strike caused widespread disruptions, including ferry cancellations to and from the Greek islands and reduced public transport services in the capital, leading to severe traffic congestion. Train services were entirely suspended during the strike period. The unions, representing both private sector workers and civil servants, are protesting a proposed labor law that would introduce greater flexibility in working conditions, such as extending occasional shifts to 13 hours through overtime. Critics argue that the legislation, set for a parliamentary vote on Wednesday, could expose workers to potential exploitation by employers. ADEDY, the civil servants’ umbrella union, condemned the law, stating that flexible working hours would effectively dismantle the eight-hour workday, erode work-life balance, and legitimize over-exploitation. Unions are demanding the withdrawal of the legislation, a reduction in the standard workweek from 40 to 35 hours, pay raises, and the restoration of collective bargaining agreements.