Research presented at the European College of CNP Congress in Berlin has found a link between birth season and mood. In other words, the month you’re born can also affect your disposition — both in good and not-so-good ways. The researchers found that people born in the spring and summer have a significantly higher tendency to be excessively positive and upbeat, while those born in the winter were significantly less likely to have an irritable temperament than those born at other times of the year. Meanwhile, people born in the fall have a significantly lower tendency to depressive moods than those born in the winter. People who tend to have fast and frequent mood swings between feeling sad and cheerful are significantly more likely to be born in the summer, compared to those born in the winter.