Internet Theme Days refer to the collective social media tradition of assigning specific hashtags and themes to each day of the week, such as #ThrowbackThursday or #MondayMotivation. These digital traditions began in the early 2010s on platforms like Instagram and Twitter as a way to organize content and boost engagement through nostalgia or lifestyle sharing. The meme format typically pokes fun at the repetitive nature of these themes or highlights the contrast between the intended vibe of the day and a person's actual reality. From corporate attempts to stay relevant to genuine community rituals, these theme days have become a foundational part of how we perceive the passage of time in the digital age.