Spring, babies born in March, April, and May score high on hyperthymia or general optimism.
3 月、4 月和 5 月出生的婴儿在情绪亢进或普遍乐观方面得分较高。
英语百科
Hyperthymic temperament
（重定向自Hyperthymia）
Hyperthymic temperament, or hyperthymia, from Greek hyper ("over", meaning here excessive) + θυμός ("spirited"), is a proposed personality type characterized by an excessively positive disposition similar to, but more stable than, the hypomania of bipolar disorder.