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Cake day: June 21st, 2023

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  • A wireless showerhead is clearly impossible… if you don’t have a machine that works on very little energy and somehow was able to store enough hydrogen while also sucking in oxygen to make water

    Say we had technology so efficient to make thus process possible, to make 1 liter of water (1 kg) you just need 1/9 of a kg of hydrogen, so if your showehead stored 1 kg of hydrogen in an extremely enclosed space, you could "pull 9 liters of water out of the air

    Even if this device was possible, it would be extremely impractical, and would probably suffocate you by sucking all the o2 out of the air if you are in an enclosed space




  • How can you tell? I can imagine that sync would have actually done much of this

    I am a very active commenter on reddit, and right now, sync for lemmy hust feels like reddit because it’s pretty much the same. I couldn’t really tell you, but it would make sense that many people now have a design they were accustomed to before.

    But if this increase was mostly from sync, that would mean that an average sync user would have had to comment 100-200 comments every day since then, because it has just 10k downloads on google play, which probably is the major source for most of those, so you might be right





  • The Chinese Calendar

    The Chinese calendar year is the same length on average as the Gregorian year, because they have leap months.

    The Chinese calendar follows a 60 year cycle of when leap monthd are inserted into the year.

    A lunar month is 29 or 30 days long (because it’s exactly 29.53 days from one new moon to the next) so a lunar 12 month year is just over 354 days long, which is almost 11 days short of the tropical year. To keep the calendar in sync with the solar year, every couple of years thirteenth month must be inserted into the year.

    The year 2020 (4717 in the Chinese calendar) had a leap month between it’s 4th and 5th regular month, and this year (4720) there was a leap month between the 2nd and 3rd month.

    Generally, there are 22 leap months in a 60 year cycle.

    This calendar would have an error of one month every 600 years

    The Jewish calendar

    The Hebrews have a similar system, inserting 7 leap months in a 19-year cycle (metonic cycle)

    This one is even more accurate, drifting away one month only after more than 6000 years.

    So these two calendars both have an average year length of 365.25 days, so your age in both of them is about the same as in the Gregorian calendar.

    The Islamic Calendar

    What you are looking for is the islamic calendar. It is purely lunar and doesn’t have leap months. Every year is between 354 and 355 days long, meaning that after 33 years in the gregorian calendar, 34 Islamic years have passed. So no, this wouldn’t make that much of a difference with the drinking age in the US, but you could get away with alcohol 8 months earlier that way. Of course, ignoring the fact that most Muslims that unironically use the islamic calendar for everything also don’t drink