We celebrate our wedding anniversary on the twelfth day of the month.

I am planning to have my birthday party on the twenty-fourth.

Please fill in my name and address.

The Red Cross is working to help people all over the world.

He made a lamp in the shape of a dodecahedron.

My father turns fifty this year.

This ancient ruin is engraved with the shape of a counterclockwise swastika.

He is writing a thesis on abiogenesis.

He is writing a thesis on the octovocalic theory.

The heliocentric theory is the idea that the sun, not the earth, is the center of the universe.