28 Aug 2012
I happen to know when I was born (the striking of the hour was, apparently, remarked upon at the precise time).
That allowed me to calculate when I would pass the age of 1,000,000,000 (one billion) seconds, and I duly marked the occasion.
Now you can find out when your “gigasecond” is (or was), or calculate and count the number of seconds to any date.
How many seconds?
Here is my age in seconds.