  Social media manipulation poses a significant threat to cognitive autonomy
and unbiased opinion formation. Prior literature explored the relationship
between online activity and emotional state, cognitive resources, sunlight and
weather. However, a limited understanding exists regarding the role of time of
day in content spread and the impact of user activity patterns on
susceptibility to mis- and disinformation. This work uncovers a strong
correlation between user activity patterns and the tendency to spread
manipulated content. Through quantitative analysis of Twitter data, we examine
how user activity throughout the day aligns with chronotypical archetypes.
Evening types exhibit a significantly higher inclination towards spreading
potentially manipulated content, which is generally more likely between 2:30 AM
and 4:15 AM. This knowledge can become crucial for developing targeted
interventions and strategies that mitigate misinformation spread by addressing
vulnerable periods and user groups more susceptible to manipulation.
