Purpose: This study aimed to examine the role of green human resource management on environmental performance at Islamic universities, with the mediating effect of green cultural festivals and the moderating role of individual green values. Design/methodology/approach: The research employed random sampling techniques by selecting a sample of 192 students from various Islamic universities in Indonesia. The participants were selected through an online survey. In addition, data analysis was done using the structural equation modelling-partial least squares (SEM-PLS) technique with the SmartPLS 3.0. Findings: Implementing green human resource management has become a crucial factor in enhancing the environmental performance of Islamic universities. Moreover, green cultural festivals function as an intermediary variable. At the same time, individual green values exhibit a moderating variable that can enhance the influence between green human resource management and environmental performance. Practical implications: Implementing an effective green human resource management strategy enhances environmental performance. Green human resource management has assisted universities in creating a generation of graduates with a solid commitment to ecological sustainability and raised awareness of the significance of conserving the environment. As a result, this commitment equips students to become agents of change in society upon graduation. Furthermore, campuses need to integrate environmental curriculum components into all study programs, as students need to understand the significant impact of environmental stewardship from both Islamic and scientific perspectives. Originality/value: This research provides a novel perspective on how Islamic universities are exceptionally well-equipped to create environmental awareness and values that students can practically apply post-graduation using green cultural festivals, which are regularly held. This study is the first to introduce the concept of green cultural festivals in universities utilising the basis of combining green culture with cultural festivals with the theoretical background of resource-based theory.