The DayOfWeek command returns the day of the week on which the given date falls.

$\mathrm{with}\left(\mathrm{Finance}\right)\:$

$\mathrm{DayOfWeek}\left(''November\; 09,\; 2006''\right)$

$\mathrm{Thursday}$

$\mathrm{DayOfWeek}\left(''Nov-09-07''\right)$

$\mathrm{Wednesday}$

$\mathrm{date}≔\mathrm{FormatDate}\left(''November\; 19,\; 2006''\,\mathrm{record}\right)$

$\mathrm{date}≔\mathrm{Record}\left(\mathrm{weekDay}=1\,\mathrm{monthDay}=19\,\mathrm{month}=11\,\mathrm{year}=2006\,\mathrm{format}=''\%B\; \%e,\; \%Y''\right)$

$\mathrm{DayOfWeek}\left(\mathrm{date}\right)$

$\mathrm{Sunday}$

$\mathrm{date}≔\mathrm{FormatDate}\left(''November\; 19,\; 2006''\,\mathrm{list}\right)$

$\mathrm{date}≔\left[19\,11\,2006\right]$

$\mathrm{DayOfWeek}\left(\mathrm{date}\right)$

$\mathrm{Sunday}$

$\mathrm{SetEvaluationDate}\left(''November\; 19,\; 2006''\right)\:$

$\mathrm{EvaluationDate}\left(\right)$

$''November\; 19,\; 2006''$

$\mathrm{DayOfWeek}\left(\right)$

$\mathrm{Sunday}$

The Finance[DayOfWeek] command was introduced in Maple 15.

For more information on Maple 15 changes, see Updates in Maple 15.