Lentera Senja, short for Lansia Energik Sejahtera Sehat Sentosa Jiwa dan Raga (Energetic, Prosperous, Healthy, and Peaceful Older Adults in Body and Mind), is an initiative by the Center for Life-Span Development (CLSD) at the Faculty of Psychology, Universitas Gadjah Mada (UGM) that develops a support toolkit to help older adults enhance their understanding of psychological well-being. The program stems from Indonesia’s demographic reality: according to Statistics Indonesia (2023), the proportion of older adults has reached 11.56% and is projected to rise to 20% by 2045. Alongside increasing life expectancy, older adults face complex challenges such as declining physical and cognitive functioning, shrinking social networks, and heightened risks of loneliness, depression, and anxiety. Existing services have tended to prioritize physical health, while psychological, social, and educational dimensions remain insufficiently integrated. This gap motivated the CLSD team to design a structured, user-friendly, evidence-informed toolkit that provides clear guidance for facilitators to strengthen older adults’ understanding of psychological well-being.