Multiple sources confirm that Changpeng 'CZ' Zhao's social media posts have directly instigated a frenzy of memecoin trading on the BNB Chain. Reports from outlets like Cointelegraph, The Block, and CCN describe how his posts about his dog, 'Broccoli', or the number '4' led to massive rallies in related memecoins. While the evidence does not show CZ using the exact phrase 'BNB Meme Season', his actions are widely interpreted by media and traders as a 'push', 'soft shill', or catalyst that highlights and fuels this specific trend, effectively kicking off a meme season on the network.