The 3 Million Registered Users Party was a custom party in Club Penguin Online to celebrate 3 million registered users. It began on June 17, 2019 and ended on June 23, 2019. In addition to the party, the 3MILLION Code was released a few days prior.
This party marked the introduction of a brand new, permanent custom room to Club Penguin Online, the Pond. It was here that players could collect the 3 Million Party Hat.