Armchair physics here, so take it for what it's worth - time is affected by mass as well as velocity. The faster you travel, the more time is dilated. Likewise, the larger a body of mass you approach, the more time is dilated.
So, if you were somehow able to accelerate a spaceship to 99% the speed of light - something like 179,000 miles per SECOND - then time for you would pass "slower". 2 weeks (for you) at that speed might end up being several years for all of the people back home that didn't book the same flight.
If, on the other hand, you were to get caught up in the event horizon of a black hole, an observer at a safe distance would see you crushed into a stream of matter in a few minutes. For you, caught in your flying coffin, time would become heavily dilated, seeming to pass very, very slowly. Those few minutes observed from the outside could seem like a much, much longer time for you, assuming that getting caught in that much gravity didn't instantly kill you. Which it would. Very much. So, so dead.
Thing is, the Earth has neither the mass nor the velocity to have a huge relativistic effect on us. The difference in the recorded passage of time on the surface of the planet vs. the recorded passage of time on a satellite 20 miles up, traveling at 30 miles per second, is a few fractions of a second per day. Not good for GPS, but according to the theory there'd be a difference of only a few minutes after many, many years.
Long story short, if you live at the top floor of a 50 story building for 70 years, relativity will end up giving you about an extra ~45 seconds or so of time. And that's assuming you stay there every moment of those 70 years.
