The film opens in the endless suburbs of Guangzhou with a question that cuts across cultures and generations: why do we all sing the same song? And why do we celebrate birthdays in a similar way all over the world? In an apartment, Amy celebrates with her children—candles, laughter, and the familiar melody. Meanwhile, a digital map lights up as researchers reveal that, for the first time, billions of people are simultaneously performing the same intimate ritual. This universal image becomes the starting point for a journey that blends the personal with the global. The journey takes us to Louisville, Kentucky, where we discover the original manuscript by the Mildred sisters, kindergarten teachers who in 1893 created Good Morning to All. From there, we travel to New York and, through archival footage, explore how the invention of cinema, mass culture, and the expansion of the capitalist system through American culture transformed the song into a global phenomenon. Yet birthdays predate this melody and are tied to the origin of time and the creation of the first calendars. Historian Diana Uribe guides us from Sumerian civilization to ancient Rome, showing how these celebrations survived prohibitions and cultural transformations to become syncretic rituals. Through interviews with a mother in Madrid, a quinceañera in Mexico, a young man in India, and a grandmother in Poland, the film reveals that birthdays do more than mark beginnings: they are rites of passage that traverse time, belonging, and memory. Each protagonist offers an intimate, unique, and complementary perspective, reflecting both the diversity and the universality of the celebration. Good Morning to All does not offer answers, but rather an invitation to look again at something we thought we knew—to question what we do and take for granted—and to reveal how a simple, personal gesture can serve as a mirror of our ambitious, fast-paced, interconnected, and frenetic modern life.