R Under development (unstable) (2023-11-19 r85561 ucrt) -- "Unsuffered Consequences"
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> library(gtools)
> 
> today <- Sys.Date()
> tenweeks <- seq(today, length.out = 10, by = "1 week")
> 
> df1 <- data.frame(dates = tenweeks, chars = letters[1:10], ints = 1:10, numeric = 1.1:10.1)
> df2 <- data.frame(chars = letters[11:20], ints = 11:20, numeric = 11.1:20.1)
> 
> smartbind(df1, df2)
          dates chars ints numeric
1:1  2023-11-20     a    1     1.1
1:2  2023-11-27     b    2     2.1
1:3  2023-12-04     c    3     3.1
1:4  2023-12-11     d    4     4.1
1:5  2023-12-18     e    5     5.1
1:6  2023-12-25     f    6     6.1
1:7  2024-01-01     g    7     7.1
1:8  2024-01-08     h    8     8.1
1:9  2024-01-15     i    9     9.1
1:10 2024-01-22     j   10    10.1
2:1        <NA>     k   11    11.1
2:2        <NA>     l   12    12.1
2:3        <NA>     m   13    13.1
2:4        <NA>     n   14    14.1
2:5        <NA>     o   15    15.1
2:6        <NA>     p   16    16.1
2:7        <NA>     q   17    17.1
2:8        <NA>     r   18    18.1
2:9        <NA>     s   19    19.1
2:10       <NA>     t   20    20.1
Warning message:
In smartbind(df1, df2) :
  Converting non-atomic type column 'dates' to type character.
> 
> proc.time()
   user  system elapsed 
   0.20    0.07    0.28