This function checks whether the variable is an IDate class.
See also
Other Support:
camel_clean()
,
check_inputs()
,
cut_hour()
,
extract_date_range()
,
extract_hr()
,
heat_colours()
,
is_date_format()
,
maxmin()
,
pairwise_count()
,
read_preamble()
,
rgb2hex()
,
totals_bind()
,
totals_col()
,
tstamp()
,
us_to_space()
,
wrap()