In physics, spacetime is any mathematical model that fuses the three dimensions of space and the one dimension of time into a single four-dimensional continuum. Spacetime diagrams can be used to visualize relativistic effects such as why different observers perceive where and when events occur.

Source: Wikipedia

The Lord does not count time as we do. He is above and outside of the sphere of time. God sees all of eternity’s past and eternity’s future. The time that passes on earth is of no consequence from God’s timeless perspective. A second is no different from an eon; a billion years pass like seconds to the eternal God.

Source: gotquestions.org

2 Peter 3:8

“But do not forget this one thing, dear friends: With the Lord a day is like a thousand years, and a thousand years are like a day.“