Why celebrate this?

Monumental progress

Our planet Earth, along with the rest of the Solar System travels around the galactic center of the Milky Way Galaxy every 225 million Earth years.

One centi-arcsecond of this rotation is called a Galactic Tick. A Galactic Tick happens every 633.7 days, or 1.7361 years1.

Galactic Tick Day is set aside to acknowledge our Sun's motion, our progress around the home galaxy, and to celebrate humanity's knowledge of this motion.