How Long Was Each Day of Creation?

In an attempt to align the Creation account in Genesis with modern theories on the beginning of life, some have tried to argue that each day of creation spoken of in Genesis actually lasted a thousand or million years rather than 24 hours. How long was each day of Creation?

Additional Resources:

Did God Kill the Dinosaurs? https://www.tomorrowsworld.org/magazi...

Why Creationists Are Wrong? https://www.tomorrowsworld.org/teleca...