[Revolting cat!]

What’s a “day”?

Uhm, 24 hours. Even in the Chinese calendar, imagine that! (You're welcome.)

[mamelukesabre]

Who says a day is constant over the last billions of years?

[sobieski]

What’s a “day”?
Uhm, 24 hours. Even in the Chinese calendar, imagine that! (You’re welcome.)

...

Not according to St Paul, who said that 1,000 years are a day in Your eyes.