The phrase o’clock comes from older English where people would say “of the clock” to specify time clearly when mechanical clocks became common. Over time, “of the” was shortened in speech to just “o,” giving us expressions like three o’clock. Want more interesting content like this ? Follow gravitonomy :) Via : Unknown No copyright infringement intended. Kindly DM for Credit/Removal/Collaboration :) #clock #science #facts #time #education