Surprisingly the answer to your question is quite involved. I will answer it from a freedivers point of view. First of all, holding your breath has different effects depending on what circumstances you do it under. When you exercise normally your breath will increase as a response to the increased levels of CO2 in your blood.
February 14 is celebrated as St. Valentine's Day in various Christian denominations; it has, for example, the rank of 'commemoration' in the calendar of saints in the Anglican Communion. In addition, the feast day of Saint Valentine is also given in the calendar of saints of the Lutheran Church.
In the 1990s, the Saint Valentine day (February 14th), a holiday for lovers, gained a popularity that sometimes exceeded that of the independence day two days later (February 16th). Not native to Lithuania, the Valentine day celebrations were completely imported from the West.