Would you feel depressed if it has rained for several days? Sunshine affects our mood. The medical sector generally believes that seasonal affective disorder (SAD) is related to shorter sunshine duration in autumn and winter, as sunlight affects the activity of the brain. A study participated by an accounting scholar from City University of Hong Kong (CityU) found that if the weather is sunny immediately before releasing an earnings forecast, firm managers tend to issue more upwardly biased forecasts. The study results provided insight into the role that transient emotional states play in shaping managerial judgment.