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Is it just me? Centuries not matching decades.. And no year 0.

  • 30-10-2013 11:18AM
    #1
    Posts: 18,046 ✭✭✭✭


    Gotta say I'm a bit shocked that I didn't know this.. The naughties started on 01/01/2000 but this century and millennium started on 01/01/2001. And I always thought the calender went 1BC-0-1AD but that's wrong too. It seems BC and AD refer to an imaginary space in time since they fall onto each other. 1BC-1AD.

    Feel like a tit telling an 11 year old student today that he was wrong for saying it.


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Comments

  • Registered Users, Registered Users 2 Posts: 3,607 ✭✭✭stoneill


    The Mayans had it all worked out.


  • Registered Users, Registered Users 2 Posts: 222 ✭✭Captain Farrell


    And you're allowed to be a teacher?


  • Closed Accounts Posts: 3,516 ✭✭✭wazky


    Is today still Wednesday then?


  • Posts: 24,867 ✭✭✭✭ [Deleted User]


    I would have thought that 0AD began on 25/12/0000 and the 1AD would have kicked off on the 1st of January.


  • Closed Accounts Posts: 22,559 ✭✭✭✭AnonoBoy


    I thought I'd wandered into the marijuana legalisation thread there for a minute.


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  • Registered Users, Registered Users 2 Posts: 22,605 ✭✭✭✭kneemos


    Gotta say I'm a bit shocked that I didn't know this.. The naughties started on 01/01/2000 but this century and millennium started on 01/01/2001. And I always thought the calender went 1BC-0-1AD but that's wrong too. It seems BC and AD refer to an imaginary space in time since they fall onto each other. 1BC-1AD.

    Feel like a tit telling an 11 year old student today that he was wrong for saying it.

    If it's measured in years you would need a complete year to start the clock.


  • Registered Users, Registered Users 2 Posts: 11,810 ✭✭✭✭sbsquarepants


    I think your confusion stems from the fact that there is no year zero, which makes total sense when you think of it.(Also it didn't end well when the Khmer Rouge had one, so probably just as well:D)
    When you start to count anything you start at 1, not 0. Therefore the first item in the second group of 1000 items, be they years, bananas or notches on your bed post, starts at 1001, first item in the 3rd group of 1000 starts at 2001 and so on.


  • Banned (with Prison Access) Posts: 326 ✭✭Savoir.Faire


    It was an utter outrage that the Julian Calendar was dropped in favour of the Gregorian. It really makes life difficult for a dilettante in early and medieval history.


  • Posts: 18,046 ✭✭✭✭ [Deleted User]


    And you're allowed to be a teacher?

    Apparently so. I could be forgiven considering the entire world celebrated the new millennium on the 1/1/2000.


  • Posts: 18,046 ✭✭✭✭ [Deleted User]


    When you start to count anything you start at 1, not 0.

    We count our lives starting with 0.


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  • Banned (with Prison Access) Posts: 23,554 ✭✭✭✭Sir Digby Chicken Caesar


    We count our lives starting with 0.

    no we don't.. the first year is year 1. the first birthday is the conclusion of the first year


  • Posts: 18,046 ✭✭✭✭ [Deleted User]


    no we don't.. the first year is year 1. the first birthday is the conclusion of the first year

    So how old are we when we pop out? That the logic I used when I figured there was a year 0. Never been told otherwise.


  • Registered Users, Registered Users 2 Posts: 4,930 ✭✭✭Jimoslimos


    We count our lives starting with 0.
    Think of it like a football match (or any time-limited sporting event). An incident, such as a goal scored, after 20 seconds is said to have occurred in the 1st minute, not the zeroth.

    So if your age is 33, then you are 33 years old but you're in your 34th year.


  • Closed Accounts Posts: 3,516 ✭✭✭wazky


    So how old are we when we pop out?

    9 months unless your premature.


  • Registered Users, Registered Users 2 Posts: 68,173 ✭✭✭✭seamus


    Since time measurement is arbitrary anyway, this is debateable.

    The standard for date/time definition in data interchange in computers includes a year zero.

    A year zero is in fact more logical since you're talking about counting of years. Counting always starts at zero (because you don't have 1 year until the end of the first year).

    The calendar format that we use isn't actually a counter, but a reference. So today is not 30 days since the start of October, it is the 30th day of October. 30 days have not elapsed until midnight tonight.
    This is the same basis on which people say that there is no "year zero" in the Gregorian calendar, because this is the 2013th year, not that 2013 years have elapsed.

    In any case, this isn't even the 2013th year, as we haven't been using this calendar for 2012 years. Mistakes and errors have been made in translation, and since the actual length of time since the alleged birth of Christ is unknown, this year is effectively arbitrarily numbered 2013 from some unknown date in the past.

    So the debate about whether a year 1 exists or not is moot since we arbitrarily decided that one year was 1582 and we've been referencing our dates from that point ever since.

    In a logical brain it makes more sense that there would be a year zero. So don't feel bad about simply assuming the most obvious thing is the reality.


  • Closed Accounts Posts: 217 ✭✭Systemic Risk


    Easy mistake to make since we all celebrated the new millenium 00:00:01 on 01/01/2000.

    If going by the Gregorian system BC AD etc. then we should have celebrated it on the 01/01/2001 being the good Christians that we are.

    Its more scientific to go by 01/01/2000 as the start of the new millennium and using a calendar system that goes -infinity,...-3,-2,-1,0,1,2,3...infinity.

    However based on the system commonly in use in Ireland, particularly in a catholic primary school system (I'm guessing based on the age of the child you teach), the child was 100% correct.


  • Posts: 18,046 ✭✭✭✭ [Deleted User]


    Jimoslimos wrote: »
    Think of it like a football match (or any time-limited sporting event). An incident, such as a goal scored, after 20 seconds is said to have occurred in the 1st minute, not the zeroth.

    So if your age is 33, then you are 33 years old but you're in your 34th year.

    Yea, I completely agree.. That's logical. The calender system is different and that's what I didn't know.

    The calender system we have means that that goal after 20 seconds would be said to have occurred in the "2nd minute".


  • Subscribers Posts: 32,937 ✭✭✭✭5starpool


    Apparently so. I could be forgiven considering the entire world celebrated the new millennium on the 1/1/2000.

    Not the entire world. I think Finland at least celebrated it a year later.

    I don't think most people though are or will be hung up by a technicality nearly 14 years ago. I think the impact of the first digit of the year incrementing for the first time in 1000 years was the main reason it was more logical to hold bigger celebrations that year rather than the next. There was a lot of articles and stories back then about that fact that the millennium wasn't technically until the following year though.


  • Registered Users, Registered Users 2 Posts: 6,757 ✭✭✭marcbrophy


    This is as annoying as trying to explain to people that an event like wrestlemania 5 has been 4 years since the original, not 5!

    I remember trying to tell people on 1/1/00 that the new millenium was still a year away, but would they listen? Like fook they would :pac:


  • Closed Accounts Posts: 217 ✭✭Systemic Risk


    I think your confusion stems from the fact that there is no year zero, which makes total sense when you think of it.(Also it didn't end well when the Khmer Rouge had one, so probably just as well:D)
    When you start to count anything you start at 1, not 0. Therefore the first item in the second group of 1000 items, be they years, bananas or notches on your bed post, starts at 1001, first item in the 3rd group of 1000 starts at 2001 and so on.

    Time is usually measured from 0. If I calculating future growth using an exponential function then this moment t=0. If I am looking at a time series of observation of a process from the point which the process began then the initial observation is always t=0 not t=1.


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  • Registered Users, Registered Users 2 Posts: 7,237 ✭✭✭Tombo2001


    Gotta say I'm a bit shocked that I didn't know this.. The naughties started on 01/01/2000 but this century and millennium started on 01/01/2001. And I always thought the calender went 1BC-0-1AD but that's wrong too. It seems BC and AD refer to an imaginary space in time since they fall onto each other. 1BC-1AD.

    Feel like a tit telling an 11 year old student today that he was wrong for saying it.

    Reminds me of the time that Dan Quayle corrected the 10 year old for spelling Potato wrong.......why its Potatoe, you silly.....

    At least you didnt do it on national TV when running a vice presidential campaign.


  • Registered Users, Registered Users 2 Posts: 1,327 ✭✭✭Absoluvely


    The calender system we have means that that goal after 20 seconds would be said to have occurred in the "2nd minute".

    That would only be the case if the calendar system we have referred to the current year as "the 2013th year" rather than "the year 2013", which it doesn't.


  • Registered Users, Registered Users 2 Posts: 68,173 ✭✭✭✭seamus


    Absoluvely wrote: »
    That would only be the case if the calendar system we have referred to the current year as "the 2013th year" rather than "the year 2013", which it doesn't.
    Technically it does, we've just removed the part which causes it to make sense.

    The outdated "A.D." suffix for "Anno Domini" meaning, "In the year of our lord", makes it a bit clearer what the reference is.

    "In the year of our lord, 2013", is fairly clearly saying, "The 2013th year"

    The modern suffix is C.E., meaning "Common Era", which used in conjunction with the year, is clearly saying "2013 [of the] Common Era", again showing that the year is a reference, not a counter.

    You're right though in that we now rarely see any suffix on the date any more, which could confuse it.

    Add into that the problem that we mix references with counters - We write the date as a reference, but the time as a counter - it's not surprising that people will get confused and assume there was a year zero. There's an hour zero, so why not a year zero?

    Our current calendar system is a bit of a mess, requiring tweaks and adjustments all over the place, it would be nice to make something more refined with a proper astronomical basis.


  • Registered Users, Registered Users 2 Posts: 1,327 ✭✭✭Absoluvely


    The calender system we have means that that goal after 20 seconds would be said to have occurred in the "2nd minute".
    Absoluvely wrote: »
    That would only be the case if the calendar system we have referred to the current year as "the 2013th year" rather than "the year 2013", which it doesn't.
    seamus wrote: »
    Technically it does, we've just removed the part which causes it to make sense.

    The outdated "A.D." suffix for "Anno Domini" meaning, "In the year of our lord", makes it a bit clearer what the reference is.

    "In the year of our lord, 2013", is fairly clearly saying, "The 2013th year"

    Right.

    In that case I should have said "That would only be the case if <the calendar system we have> referred to the current year as "the 2014th year" rather than "the 2013th year", which it doesn't".

    Right?


  • Closed Accounts Posts: 3,981 ✭✭✭[-0-]


    Time does not exist.


  • Registered Users, Registered Users 2, Paid Member Posts: 16,057 ✭✭✭✭josip


    When you start to count anything you start at 1, not 0.

    Dude, do you even code?
    [-0-] wrote: »
    Time does not exist.

    Yeah, I read that too that time is an illusion caused by us being on the inside of our quantum bubble, rather than an observer on the outside where our universe would seem to stand still. Deep. Shlt.


  • Registered Users, Registered Users 2 Posts: 20,237 ✭✭✭✭jimgoose


    Oh, around here you think time goes that way, yeah? If there is no actual "Year Zero" then referring to this transition point between BC and AD is rather misleading. It should henceforth be called NULL.


  • Banned (with Prison Access) Posts: 10 Denisovan


    Gotta say I'm a bit shocked that I didn't know this.. The naughties started on 01/01/2000 but this century and millennium started on 01/01/2001. And I always thought the calender went 1BC-0-1AD but that's wrong too. It seems BC and AD refer to an imaginary space in time since they fall onto each other. 1BC-1AD.

    Feel like a tit telling an 11 year old student today that he was wrong for saying it.

    It's the zeros, not the naughties.


  • Registered Users, Registered Users 2 Posts: 11,810 ✭✭✭✭sbsquarepants


    [-0-] wrote: »
    Time does not exist.

    Block universe - it's time Jim, but not as we know it:D
    josip wrote: »
    Dude, do you even code?

    Nope, I starts my counting with 1, it's how I was raised and it's how i'll die. :pac:


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  • Closed Accounts Posts: 3,465 ✭✭✭Sir Humphrey Appleby


    It seems BC and AD refer to an imaginary space in time since they fall onto each other. 1BC-1AD.

    Generally speaking the term BC has been replaced by BCE.


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