Authors review the literature related to the suicide and the victims' birthday, but they have not found study, which have shown a strong connection. They investigated a large Hungarian sample using the well-known methods, but they have applied also a new one supposing they will found some connection. All the three methods have shown a strong relationship between the date of birthday and the date of suicide among man in all age-groups: namely, much more man committed suicide on his birthday than on other days of the year. Only a slight significant connection they found among the female aged 60 and more. Authors did search the conceivable causes (sociologic, cultural etc.) but they have not found any explanation. The cause is presumably is the special sensibility of the Hungarian man.