Time dilation is a well understood phenomenon by relativistic physics. For example, astronauts in space (thereby experiencing less pull due to the Earth’s gravity) experience time as passing faster relative to those on Earth (and thereby experiencing more pull due to gravity).

What’s less well understood is how it comes into play on Fast Sundays. Using the equations of general relativity and neglecting any differences in velocity (people on Fast Sundays are unlikely to be moving or slower than on other Sundays), the equations of time dilation simplify to

\(r = 2MG / c^2 (1-𝛿t^2)\)

where \(r\) is the distance to God, \(M\) is the mass of God, \(G\) is the universal gravitational constant, \(c\) is the speed of light and \(𝛿t\) is the relative time dilation experienced. This shows that as time passes more slowly, the denominator increases meaning that the distance is less, and we are coming closer to God.

Now, \(G\) and \(c\) are well known constants, but \(r\) and \(M\) are unknown, as is the time dilation we experience normally. Thus we can’t actually determine how much closer we are getting to God on Fast Sundays. However, I encourage you to make some assumptions about the mass of God and our usual distance from him to see how much closer we are on Fast Sunday.