The Julian calendar's year was about 11 minutes too long. Since the Council of Nicaea in 325, the spring equinox had drifted by ten days. To fix it, Pope Gregory XIII decreed that Thursday, October 4, 1582 would be followed by Friday, October 15. France followed in December, jumping straight from the 9th to the 20th. Britain held out until 1752, by which time it had to skip eleven days.
Around 2300 BCE, Enheduanna, daughter of King Sargon of Akkad, became high priestess of the Moon god at Ur. She composed hymns to the goddess Inanna and put her name to them. She is the oldest person identified as the author of a literary work, about 1,500 years before Homer.
Squeeze Earth's 4.5 billion years into a single 24-hour day. Homo sapiens shows up around 11:59:54 p.m., roughly six seconds before midnight. All of written history, from Sumerian tablets to today, fits into the final tenth of a second. A cosmic blink.