As described in #553 and #948 datetimes written by write_excel_csv now have the format 2018/01/01 00:00:00. The pity is that readr's read functions do not recognize this format. Can it be changed to a dashed format, because afaics Excel also accepts that?
str(readr::parse_guess("2018/01/01 00:00:00"))
#> chr "2018/01/01 00:00:00"
str(readr::parse_guess("2018-01-01 00:00:00"))
#> POSIXct[1:1], format: "2018-01-01"
<sup>Created on 2021-04-30 by the [reprex package](https://reprex.tidyverse.org) (v0.3.0)</sup>