1 gigasecond = 11 574 days 1 hour 46 minutes 40 seconds
~ 31 2/3 years
It may be interesting to find out when that is in a lifetime. When will you be (or were you) 1Gs old? The following website lets you do almost that. Give it your birth date and it will tell you when you will be certain round numbers of seconds old (and minutes and hours etc.) Unfortunately (for the present discussion) it starts at 1.5 Gs so I couldn't find 1 Gs.
This web is: http://www.timeanddate.com/date/birthday.html
It gives results down to the nearest second, IF you know the exact time of day when you were born. I didn't, so my time of day would be wrong; therefor I omitted it from the values below.
According to that web site, I was: 2 gigaseconds old on Sunday, November 29, 1998 and will be 2.5 gigaseconds old on Friday, October 3, 2014.
I probably will not see 3 gigaseconds which would be reached on August 7, 2030.
I did find on that web site that I had an anniversary that I COULD (and did) celebrate; I was 600000 hours old on Thursday, December 25, 2003 (this past Christmas Day).
Sometimes information is useless but fun anyway.
Regards, Bill Hooper Fernandina Beach, Florida, USA
