Unlike the typically anonymous online social environments of the 1990s, characterized by a nickname culture and a freedom to engage in changing identity games (Bechar-Israeli, 1995), modern social media profiles are often non-anonymous, with users revealing their real offline identities (Zhao, Grasmuck, & Martin, 2008). While Facebook and Google+ enforce real-name policies that require users to use their real names, Twitter and Instagram do not impose strict namerelated rules. Still, many users choose to disclose their full names on these social media platforms (Kaarakainen & Hutri, 2016; Peddinti, Ross, & Cappos, 2014). Thus, many social media users-including, in particular, Facebook users-have now chronicled a decade or more of their lives online, with digital traces linked to their past identities available to their friends and acquaintances. In this article, we argue that the advent of non-anonymous social media has changed the contextual conditions for socializing and self-performance (Zhao et al., 2008), as well as how users perceive time. According to Schoenebeck, Ellison, Blackwell, Bayer, and Falk (2016), existing work on social media has tended to focus on their "newness" and the ways in which content posted to social media portrays the current moment. However, to a large degree, modern social media may also capture, archive, and make semi-publicly or publicly available a history of the self. Current studies have not investigated how self-identity is an entity in progress in relation to social media performance over time. This research, therefore, lacks knowledge of how the nature and experience of time in social media might influence users' self-performance and participation. In particular, younger users born after 1990, or "social media natives," who have grown up with social media like Facebook, may experience that their life and identity transitions are marked by different self-performance practices in social media from their early youth to their young adulthood. Since identity is not completely stable over time, it is reasonable to assume that users will become cautious of the 763349S MSXXX10.