{"id":717,"date":"2007-01-28T23:08:14-05:00","date_gmt":"2007-01-29T04:08:14+00:00","guid":{"rendered":"http:\/\/peterjanes.ca\/blog\/2007\/01\/28\/half-birthday\/"},"modified":"2007-01-28T23:18:04-05:00","modified_gmt":"2007-01-29T04:18:04+00:00","slug":"half-birthday","status":"publish","type":"post","link":"https:\/\/peterjanes.ca\/blog\/2007\/01\/28\/half-birthday\/","title":{"rendered":"Half-birthday"},"content":{"rendered":"

For several years I’ve been running a simple half-birthday calculator<\/a>. Every once in a while I’ll discover that it’s been noticed by a new group of people; the first, I think, was the Degrassi fan forum<\/a>, and the most prominent by far is the Macmillan Dictionary’s Word of the Week<\/a>. Until today, though, no one’s ever tracked me down to comment on it.<\/p>\r\n\r\n

And that comment raises a valid point. I explain on the calculator page that, unlike some sites, I add half a year, i.e. 182.5 days<\/q>. (The others just add six months, which means that some people wouldn’t have half-birthdays, notably those with a birthday in late August.) It’s this statement to which Scott<\/cite> replied:<\/p>\r\n\r\n

Wouldn’t that mean you’d need an input field for *time* of birth? That half a day you add would therefore change the answer.<\/p><\/blockquote>\r\n\r\n

He’s exactly right… and now comes the time to ‘fess up to my dirty little secret: I’ve never actually added 182.5 days. Instead, I’ve always added 183<\/strong>. (Some math geek<\/a> I am, eh?)<\/p>\r\n\r\n

Well, no longer. Thanks to Date::Calc<\/code><\/a> the calculator is now (almost) completely legit. I had to make a judgement call on leap years, so if you were born on or after March 1 in the year before a leap year or on or before February 29 of the leap year, you’ll still get 183 days added. A nice side effect of the new math is that if you were born on August 30 of the year before a leap year you’re one of the few who can claim February 29 as your half-birthday; this wasn’t possible before. (If you were born on or near a leap-second, tough — do your own math!)<\/p>\r\n\r\n

We now return you to your regularly scheduled (half-)lives. \ud83d\ude42<\/p><\/div>

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