4 ms·

Wolfram Alpha shows 9993 days. http://www.wolframalpha.com/input/?i=May+14%2C+1984+to+today+in+days http://www.wolframalpha.com/input/?i=May+14%2C+1984+to+toda

• orijing 15y ago
  That's wrong if you do the math yourself. Try this: http://www.wolframalpha.com/input/?i=Sept+30%2C+1984+to+today+in+days http://www.wolframalpha.com/input/?i=Sept+30%2C+1984+to+toda... It says 9855 days, which is 365 * (2011 - 1984), which is obviously not right and missing leap years.
  • abduhl 15y ago
    The correct formula that Wolfram should be using here is floor((cur_yr - old_yr)x365.25), assuming you are interested only in the recent past where the 365.25 holds true. As an aside, floor(365.25x(2011-1984))+138 gives 9,999 days elapsed which would make today the 10,000th day, as stated by Zuckerberg. EDIT: this formula only works when you begin on a day after a leap day during a leap year, thanks hennypenny
    • hennypenny 15y ago
      Your formula doesn't work. There have been 7 leap days including 1984. The date of the leap day is relevant to your formula because if he were born on Jan 1 there would be a difference in your result. Also, May 14 plus 138 days would have been September 29, not Sept 30.
      • abduhl 15y ago
        This has to do with when you take the starting point for the day I would assume. Also, I got the number from Wolfram: http://www.wolframalpha.com/input/?i=May+14+1984+to+September+30+1984+in+days http://www.wolframalpha.com/input/?i=May+14+1984+to+Septembe...
        • hennypenny 15y ago
          In the this case 'to' means 'through' and is inclusive of all the days. By adding the difference we do not twice count the number we arrived at from the first part of your calculation.
• hennypenny 15y ago
  I think what he actually wanted was http://www.wolframalpha.com/input/?i=May+14+1984+plus+9999+days&asynchronous=false&equal=Submit http://www.wolframalpha.com/input/?i=May+14+1984+plus+9999+d... Which would be 10000 days inclusive of May 14. (Wolfram says in this case that it was Sept. 29, which is correct. (ie Mark is celebrating the wrong day. But kudos to him for being aware of it in the first place. I celebrated mine July 23.))
• baddox 15y ago
  Python 2.7 shows 10,000 days. >>> datetime(2011, 9, 30) - datetime(1984, 5, 14) datetime.timedelta(10000)
  • baddox 15y ago
    Also, Ruby 1.9.2 shows 10,000 days. irb(main):017:0> (Time.utc(2011, 9, 30) - Time.utc(1984, 5, 14)) / 60 / 60 / 24 => 10000.0
    • benatkin 15y ago
      So does PHP! echo date_diff(date_create('1984-05-14'), date_create('2011-09-30'))->format('%a days'); => 10000 days Is this silly yet? ;)
  • hennypenny 15y ago
    By subtracting the day he was born you're not counting it. You're making it 'day 0'. 2 days - 0 days = 2 days.
• baddox 15y ago
  Wolfram Alpha has a bug. http://www.wolframalpha.com/input/?i=May+14%2C+1984 http://www.wolframalpha.com/input/?i=May+14%2C+1984 shows it being 10,000 days ago (if you view it before midnight on the 1st), but performing explicit ranges shows a different number.
  • hennypenny 15y ago
    If I were to say 1 day ago, I would mean yesterday, which would mean we were on day 2. Thus yesterday would have been day 10001.
• ptarjan 15y ago
  It's right: http://nerdiversary.com/1984-05-14 http://nerdiversary.com/1984-05-14
  • deleted 15y ago
    [deleted]
• biot 15y ago
  What units are "[specific date] to today" in? Does converting that to days take into account leap years? A more natural query: http://www.wolframalpha.com/input/?i=days+since+May+14%2C+1984 http://www.wolframalpha.com/input/?i=days+since+May+14%2C+19...