City history
From its origins near the Tongva village of Yaanga to adopting Pacific Standard Time in 1883, Los Angeles evolved into a global metropolis shaped by transit networks, astronomical observatories, and civic timekeeping traditions.
Chapter one
Indigenous name
"Poison oak place"
Yaanga was the primary indigenous village of the Tongva people situated near present-day Downtown Los Angeles. Spanish colonizers established the pueblo adjacent to this settlement in 1781, making Yaanga the foundational site of the modern city.
Poison oak place
The primary indigenous Tongva settlement located along the Los Angeles River, which served as a regional center before Spanish colonial contact.
The Town of Our Lady the Queen of the Angels of the Porciúncula River
Founded by Spanish settlers under Governor Felipe de Neve on September 4, 1781, establishing California's second official civilian pueblo.
City of Angels
Officially elevated from a pueblo to a city and designated as the capital of Alta California by the Mexican Congress in 1835.
The Angels
Incorporated as an American city on April 4, 1850, following California's cession to the United States and statehood, gradually shortening the official name.
Chapter two
Los Angeles abandoned local solar time (approximately UTC-7:53) and adopted Pacific Standard Time (UTC-8) during the national railroad time standardization on November 18, 1883.
The U.S. Standard Time Act established federal recognition for the Pacific Time Zone and introduced seasonal Daylight Saving Time to support wartime fuel conservation.
Los Angeles and California observed year-round Pacific War Time (UTC-7) throughout World War II to reduce energy consumption and streamline defense production schedules.
California voters enacted Proposition 12, creating the California Daylight Saving Time Act to restore seasonal clock adjustments between spring and autumn starting in 1950.
Federal passage of the Uniform Time Act standardized the start and end dates of Daylight Saving Time across California and all participating U.S. states.
Chapter three
Forty-four Spanish settlers founded the pueblo near the Tongva village of Yaanga, establishing the original settlement layout surrounding the historic plaza.
Southern Pacific Railroad introduced standardized time to Los Angeles, synchronizing train operations with the newly established Pacific Time Zone.
Astronomer George Ellery Hale founded Mount Wilson Observatory in the San Gabriel Mountains above Los Angeles, pioneering solar physics and precision cosmic measurement.
Griffith Observatory opened on Mount Hollywood, featuring a 240-pound Foucault pendulum in its central rotunda that demonstrates Earth's rotation to millions of public visitors.
Los Angeles Union Station opened with a 127-foot Mission Moderne clock tower featuring four 12-foot brass clock faces, serving as a landmark timekeeper for Western rail travel.