You can use days since 2k , but I wouldn't recommend it. It's basically double the effort for very little reward. Also, I'm aware t0 doesn't look like days since 2k , but that's because I didn't want the full values of days since 2k displayed.
Δt is the delta time x is what days since 2k is multiplied by t0 is the current value of days since 2k t1 is the previous value of days since 2k Here's formula for calculating delta time(d = days since 2k): t0 = |(d * x) - floor(d * x)| Δt = t0 - t1 t1 = t0