It relates to the culture Festival, Valentine expressed love for each other is the Songkran Festival shows love towards adult relatives in black or watering equivalent to give flowers instead of love Valentine's day Festival.
Valentine's Day is associated with the culture of love, that is the Songkran festival is showing the love of elders. Elders or the same as the flower of love on Valentine's Day.
Associated with Valentine at the culture show their love for each other, that is, the festival day Songkran is the love for the elders, Boot logging or like giving flowers love in Valentine.