A new study says the most unhappy age in life is around 47 years old. Researchers who analyzed happiness levels in more than 100 countries worldwide have discovered that life satisfaction follows a "U"-shaped curve. People are usually happiest in youth, happiness declines in middle age, and then rises again in later years. The lowest point for many people is around age 47. Let's simplify: Gen Z: Relax… you've just started life. Millennials: According to the data… this period might be tough. Scientists say that by the late 40s, happiness begins to rise again into the 50s and beyond, meaning midlife stress doesn't last forever.