An Earth day is about 24 hours long. An Earth year is about 365 days long. Days and years on other planets are different. Some planets have very long days. Some have very short days. Some have very long years. Some have very short years. Type your birthday below. Click on Mars. You will see how old you would be if you had been born there!

Type in your Birthday, and Click on a planet! Month: Day:    Year: Then, click on a planet. You are earth days old If you were on you would be "days" old and "years" old