marcar

marcar » to schedule

marcar
to mark, schedule
eumarco
você, ele, elamarca
nósmarcamos
vocês, eles, elasmarcam

MARCAR is often used when talking about setting a date. The opposite of MARCAR is DESMARCAR. You can also REMARCAR –> reschedule.
Complete conjugation.

Vamos marcar uma reuniao. (Let's set up a meeting.)

Precisamos remarcar. (We need to reschedule.)