powered by
Test that Excel number formats are date formats
is_date_format(x)
character vector of number format strings
# NOT RUN { is_date_format(c("yyyy-mm-dd", "0.0%", "h:m:s", "<U+00A3>#,##0;[Red]-<U+00A3>#,##0")) # }
Run the code above in your browser using DataLab