Editing 1825: 7 Eleven
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==Explanation== | ==Explanation== | ||
− | 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. | + | {{incomplete|Basic Explanation. Needs more. Do NOT delete this tag too soon.}} |
+ | 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, inconsistent rates, time keeping doesn't always follow a simple pattern. | ||
− | 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 (despite historically being open only from 7 AM | + | 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 (despite historically being open only from 7 AM and 11 PM local time, hence its name). |
− | The main joke in the comic refers to the fact that a | + | The main joke in the comic refers to the fact that a day on Mars (the time it takes for Mars to make a full revolution on its own axis) is about 24 hours and 37 minutes of Earth time. If a 7-11 store is open for literally 24 Earth hours per Mars day, then it would actually be closed for around 37 minutes each day. |
− | The | + | The first part of the title text refers to {{w|Daylight_saving_time|daylight saving time}}, where days can be shortened or lengthened on predefined days of the year in order to maximize use of available sunlight. In the United States, most places set clocks forward by one hour on the second Sunday of March, resulting in a 23-hour day, and back again on the first Sunday of November, resulting in a 25-hour days. Thus technically, even a 7-11 in the US would not truly be open "24 hours" every day. Arizona and Hawaii are called out as exceptions because they do not observe daylight saving time. |
− | The | + | The second part of the title text refers to {{w|leap seconds}}, which are sometimes added to December 31 in order to synchronize time with Earth's actual rotation. Years with a leap second will see its last day being one second longer than 24 hours. Since leap seconds apply to all Earth-based clocks, any store on Earth that is open "24 hours" would technically have to close for one second. |
− | + | ==Transcript== | |
+ | Sign: 7-Eleven Open 24 hours | ||
− | + | [A person in a spacesuit is trying to open the door to the convenience store] | |
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− | + | Door: Rattle rattle | |
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− | + | Caption: I'm glad they finally opened a 7-Eleven here on Mars, but it's annoying how it closes for 37 minutes every day. | |
− | + | {{incomplete transcript|Do NOT delete this tag too soon.}} | |
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{{comic discussion}} | {{comic discussion}} | ||
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