They have nostrils called blowholes. Over millions of years of evoloution whales and dolphins nostrils moved to the top of their head. This allows them to breath by surfacing instead of them sticking their whole head out of the water. The first thing a newborn dolphin must do is to go to the surface to breathe.
Franklin Roosevelt observed Thanksgiving on the second to last Thursday of November for two more years, but the amount of public outrage prompted Congress to pass a law on December 26, 1941, ensuring that all Americans would celebrate a unified Thanksgiving on the fourth Thursday of November every year.