Meaning
Eight o’clock on a clock face: the minute hand points up and the hour hand points to the 8, on the left side a little below the center.
This is the start of many office days and school periods, and a popular hour for evening meetups: “Standup at 🕗 sharp, cameras on please.” In the evening it pairs well with 🍿 or 📺 for a show or game night.