R version 4.6.0 RC (2026-04-21 r89932 ucrt) -- "Because it was There"
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Platform: x86_64-w64-mingw32/x64

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> 
> 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
2026-04-22 101.3710 101.30487
2026-04-23 100.8063 103.59152
2026-04-24 101.1694 102.20265
2026-04-25 101.8023 101.92387
2026-04-26 102.2065 101.79054
2026-04-27 102.1004 102.42649
2026-04-28 103.6119 102.14224
2026-04-29 103.5173  99.48579
2026-04-30 105.5357  97.04532
2026-05-01 105.4730  98.36543
> 
> now <- Sys.time()
> z <- zoo(mat, now + 0:9)
> z
                           x         y
2026-04-22 17:45:51 101.3710 101.30487
2026-04-22 17:45:52 100.8063 103.59152
2026-04-22 17:45:53 101.1694 102.20265
2026-04-22 17:45:54 101.8023 101.92387
2026-04-22 17:45:55 102.2065 101.79054
2026-04-22 17:45:56 102.1004 102.42649
2026-04-22 17:45:57 103.6119 102.14224
2026-04-22 17:45:58 103.5173  99.48579
2026-04-22 17:45:59 105.5357  97.04532
2026-04-22 17:46:00 105.4730  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
2026-04-22T15:45:51.977873087+00:00 101.3710 101.30487
2026-04-22T15:45:51.977873098+00:00 100.8063 103.59152
2026-04-22T15:45:51.977873109+00:00 101.1694 102.20265
2026-04-22T15:45:51.977873120+00:00 101.8023 101.92387
2026-04-22T15:45:51.977873131+00:00 102.2065 101.79054
2026-04-22T15:45:51.977873142+00:00 102.1004 102.42649
2026-04-22T15:45:51.977873153+00:00 103.6119 102.14224
2026-04-22T15:45:51.977873164+00:00 103.5173  99.48579
2026-04-22T15:45:51.977873175+00:00 105.5357  97.04532
2026-04-22T15:45:51.977873186+00:00 105.4730  98.36543
> 
> 
> proc.time()
   user  system elapsed 
   0.85    0.12    1.00