Akulturasi budaya Portugis dan Betawi di Kampung Tugu, Cilincing, Jakarta Utara, melahirkan tradisi unik bernama Tradisi Mandi-Mandi. Setiap tahun baru, masyarakat Tugu merayakan tradisi ini sebagai bentuk saling memaafkan, dengan bedak basah yang dioleskan ke wajah satu sama lain. Selama acara berlangsung, alunan lagu khas Keroncong Tugu turut menemani, menciptakan suasana harmonis dalam menyambut tahun baru. Penelitian ini menggunakan pendekatan kualitatif dengan metode penelitian fenomenologi. Pengumpulan data penelitian dilakukan dengan data primer, yaitu wawancara dan observasi serta data sekunder berupa studi kepustakaan dan dokumentasi. Wawancara dilakukan kepada para keturunan Portugis di Kampung Tugu terkhususnya yang bergabung bersama komunitas Ikatan Keluarga Besar Tugu (IKBT). Hasil penelitian menunjukkan bahwa tradisi Mandi-Mandi merupakan seni upacara yang digunakan untuk menyampaikan makna kohesi sosial di masyarakat Tugu. Pesan kohesi sosial tersebut diinterpretasikan melalui simbol-simbol yang terkandung dalam tradisi Mandi-Mandi. Penelitian ini menunjukkan bahwa tradisi Mandi-Mandi dapat digunakan sebagai media komunikasi untuk menyampaikan pesan kepada masyarakat terkait kohesivitas sosial yang di dalamnya terkandung rekonsiliasi dan semangat gotong royong. / The cultural acculturation between Portuguese and Betawi traditions in Kampung Tugu, Cilincing, North Jakarta, has resulted in a unique tradition known as Mandi-Mandi. This tradition is celebrated annually during the New Year as a gesture of mutual forgiveness, symbolized by the application of wet powder to each other's faces. The event is accompanied by the distinctive melodies of Keroncong Tugu music, fostering a harmonious atmosphere to welcome the New Year. This study adopts a qualitative approach using phenomenological research methods. Data collection involved primary sources, such as interviews and observations, as well as secondary sources, including literature reviews and documentation. Interviews were conducted with Portuguese descendants in Kampung Tugu, particularly members of the Ikatan Keluarga Besar Tugu (IKBT) community.The findings indicate that the Mandi-Mandi tradition represents a form of ceremonial art that conveys the significance of social cohesion within the Tugu community. This message of social cohesion is interpreted through various symbols embedded in the tradition. The study highlights that the Mandi-Mandi tradition serves as a communication medium to deliver messages of reconciliation and collective solidarity, emphasizing the importance of social harmony and cooperation.