I recall a billion seconds being close to 30 years.

12 days, 32 years, 300,000 years.

The last one is a thick layer of ice long ago. https://blossom.primal.net/0f237445837b74e645f1262cdc4c29ec49e34b8fc46e5e4606baa3c5dc52f61d.jpg https://21lessons.com/15/

10.57 days ~31.7 years ~31,700 years