R version 4.5.0 beta (2025-04-01 r88091 ucrt) -- "How About a Twenty-Six"
Copyright (C) 2025 The R Foundation for Statistical Computing
Platform: x86_64-w64-mingw32/x64

R is free software and comes with ABSOLUTELY NO WARRANTY.
You are welcome to redistribute it under certain conditions.
Type 'license()' or 'licence()' for distribution details.

R is a collaborative project with many contributors.
Type 'contributors()' for more information and
'citation()' on how to cite R or R packages in publications.

Type 'demo()' for some demos, 'help()' for on-line help, or
'help.start()' for an HTML browser interface to help.
Type 'q()' to quit R.

> 
> library(nanotime)
> suppressMessages(library(zoo))          
> 
> set.seed(42)
> x <- 100 + cumsum(rnorm(10))
> y <- 100 + cumsum(rnorm(10))
> mat <- cbind(x, y)
> 
> now <- Sys.Date()
> z <- zoo(mat, now + 0:9)
> z
                  x         y
2025-04-02 101.3710 101.30487
2025-04-03 100.8063 103.59152
2025-04-04 101.1694 102.20265
2025-04-05 101.8023 101.92387
2025-04-06 102.2065 101.79054
2025-04-07 102.1004 102.42649
2025-04-08 103.6119 102.14224
2025-04-09 103.5173  99.48579
2025-04-10 105.5357  97.04532
2025-04-11 105.4730  98.36543
> 
> now <- Sys.time()
> z <- zoo(mat, now + 0:9)
> z
                           x         y
2025-04-02 14:32:22 101.3710 101.30487
2025-04-02 14:32:23 100.8063 103.59152
2025-04-02 14:32:24 101.1694 102.20265
2025-04-02 14:32:25 101.8023 101.92387
2025-04-02 14:32:26 102.2065 101.79054
2025-04-02 14:32:27 102.1004 102.42649
2025-04-02 14:32:28 103.6119 102.14224
2025-04-02 14:32:29 103.5173  99.48579
2025-04-02 14:32:30 105.5357  97.04532
2025-04-02 14:32:31 105.4730  98.36543
> 
> now <- nanotime(Sys.time())                  
> z <- zoo(mat, now + 11*(0:9))           # inc. by 11 to more visible, 1 works too
> z
                                           x         y
2025-04-02T12:32:22.112761974+00:00 101.3710 101.30487
2025-04-02T12:32:22.112761985+00:00 100.8063 103.59152
2025-04-02T12:32:22.112761996+00:00 101.1694 102.20265
2025-04-02T12:32:22.112762007+00:00 101.8023 101.92387
2025-04-02T12:32:22.112762018+00:00 102.2065 101.79054
2025-04-02T12:32:22.112762029+00:00 102.1004 102.42649
2025-04-02T12:32:22.112762040+00:00 103.6119 102.14224
2025-04-02T12:32:22.112762051+00:00 103.5173  99.48579
2025-04-02T12:32:22.112762062+00:00 105.5357  97.04532
2025-04-02T12:32:22.112762073+00:00 105.4730  98.36543
> 
> 
> proc.time()
   user  system elapsed 
   0.92    0.18    1.04