The JoinHolidays command creates a new calendar obtained by joining holidays from the given two calendars. Any dates that are holidays in either of the given two calendars become holidays in the new calendar.

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

$\mathrm{Calendar1}≔\mathrm{Calendar}\left(\mathrm{Toronto}\right)\:$

$\mathrm{Calendar2}≔\mathrm{Calendar}\left(\mathrm{Null}\right)$

$\mathrm{Calendar2}≔\mathbf{module}\left(\right)\mathbf{end\; module}$

$\mathrm{AddHoliday}\left(\mathrm{Calendar2}\,''January\; 4,\; 2006''\right)\:$

$\mathrm{IsHoliday}\left(''January\; 3,\; 2006''\,\mathrm{Calendar1}\right)$

$\mathrm{false}$

$\mathrm{IsBusinessDay}\left(''January\; 3,\; 2006''\,\mathrm{Calendar1}\right)$

$\mathrm{true}$

$\mathrm{IsHoliday}\left(''January\; 1,\; 2006''\,\mathrm{Calendar1}\right)$

$\mathrm{true}$

$\mathrm{IsBusinessDay}\left(''January\; 1,\; 2006''\,\mathrm{Calendar1}\right)$

$\mathrm{false}$

$\mathrm{Calendar3}≔\mathrm{JoinHolidays}\left(\mathrm{Calendar1}\,\mathrm{Calendar2}\right)\:$

$\mathrm{IsHoliday}\left(''January\; 1,\; 2006''\,\mathrm{Calendar3}\right)$

$\mathrm{true}$

$\mathrm{IsHoliday}\left(''January\; 4,\; 2006''\,\mathrm{Calendar3}\right)$

$\mathrm{true}$

$\mathrm{RemoveHoliday}\left(''January\; 1,\; 2006''\,\mathrm{Calendar3}\right)\:$

$\mathrm{IsHoliday}\left(''January\; 1,\; 2006''\,\mathrm{Calendar3}\right)$

$\mathrm{false}$

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

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