Provide a format for ISO8601 dates and times with the requested precision.
format_ISO8601_precision_check(precision, max_precision, usetz = FALSE)The amount of precision to represent with
substrings of "ymdhms", as year, month, day, hour,
minute, and second. (e.g. "ymd" is days precision, "ymdhm" is minute precision.
When NULL, full precision for the object
is shown.
The maximum precision allowed to be output.
Include the time zone in the formatting. If
usetz is TRUE, the time zone is included. If
usetz is "Z", the time is converted to "UTC" and
the time zone is indicated with "Z" ISO8601 notation.