You certainly can accelerate to next week as measured by Earth calendars. Climb into your local particle accelerator and ask them to get you accelerating around

You certainly can accelerate to next week as measured by Earth calendars. Climb into your local particle accelerator and ask them to get you accelerating around the loop as close to the speed of light as possible. By accelerating, you can get to next week in just a few seconds of your own subjective time. Also, you can accelerate towards the black hole singularity and get there faster.