Some datetime data is presented as a separate dates and times. This function restores the full date-time.
add_time_to_date(tms, dts, verbose = FALSE)
vector of times, i.e. number in range 0 to 2400, as string or integer, with or without trailing zeros
vector of dates, in string format %Y-%m-%d or simple R Date objects
single logical value, if TRUE
then produce verbose
messages
vector of POSIXlt date-times