How fast are we moving when we're sitting down?

[splat_ed]

Just remember that we're living on a planet that's evolving
And revolving at 900 miles an hour.
That's orbiting at nineteen miles a second, so it's reckoned,
A sun that is the source of all our power.
The sun and you and me and all the stars that we can see
Are moving at a million miles a day
In an outer spiral arm, at forty thousand miles an hour,
Of the galaxy we call the 'Milky Way'.
.
.
.
Giving that he had to make the lyrics parse his numbers were quite close. Nicely done Eric Idle!

 

[Red Squirrel]

0 km/h relative to the chair.

 

[JTsyo]

Relative velocity is the only thing that matters, if you are going 1.3 million mph relative to earth. All you need to do is calculate time dilation. To you the earth time will be moving slower, to the earth your time will be moving slower.

So if you send a message out from 1 light minute out, does it get there flight time + 1 min or would there be extra time due to dilation?