R Under development (unstable) (2023-12-02 r85657 ucrt) -- "Unsuffered Consequences"
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> library(spacetime)
> if (require(raster, quietly = TRUE)) {
+  x <- brick(system.file("external/rlogo.grd", package="raster"))
+  x <- setZ(x, as.Date(1:nlayers(x), origin = "1970-01-01"))
+  stplot(x)
+ }
> 
> proc.time()
   user  system elapsed 
   4.54    0.17    4.70