Editing 1825: 7 Eleven
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This comic pokes fun at the idiosyncrasies of time keeping. Since units of time are intimately tied to a planet's rotation, and planets rotate at different rates, time keeping doesn't always follow a simple pattern. | This comic pokes fun at the idiosyncrasies of time keeping. Since units of time are intimately tied to a planet's rotation, and planets rotate at different rates, time keeping doesn't always follow a simple pattern. | ||
β | Many stores advertise being open 24/7, which means that they're open all day, every day. Many locations of the convenience store chain {{w|7-Eleven}} are now "open 24 hours", again meaning they are always open | + | Many stores advertise being open 24/7, which means that they're open all day, every day. Many locations of the convenience store chain {{w|7-Eleven}} are now "open 24 hours", again meaning they are always open. |
The main joke in the comic refers to the fact that a {{w|Timekeeping_on_Mars#Time_of_day|day on Mars}} (the time it takes for Mars to make a full rotation on its own axis) is about 24 hours and 37 minutes. If a 7-11 store is open for literally 24 hours per Mars day, then it would actually be closed for around 37 minutes each day. NASA, for its Mars missions, uses a "Mars-hour" that is one twenty-fourth of a Martian day; had the sign implicitly referred to 24 Mars-hours then the store would be open for the entire Mars day. | The main joke in the comic refers to the fact that a {{w|Timekeeping_on_Mars#Time_of_day|day on Mars}} (the time it takes for Mars to make a full rotation on its own axis) is about 24 hours and 37 minutes. If a 7-11 store is open for literally 24 hours per Mars day, then it would actually be closed for around 37 minutes each day. NASA, for its Mars missions, uses a "Mars-hour" that is one twenty-fourth of a Martian day; had the sign implicitly referred to 24 Mars-hours then the store would be open for the entire Mars day. |