der Termin — an appointment, or a fixed date. Duden traces the word to Latin terminus, a boundary mark.
einen Termin vereinbaren or ausmachen — to agree on a date.
der Terminkalender — the appointment diary.
Ich muss mal in meinen Kalender schauen. — I have to look in my calendar.
sich etwas vormerken — to note something down for later.
Der Termin steht. — The date is fixed.
einen Termin verschieben — to move a date.
jemanden vertrösten — to give someone hope of a later time instead of what they asked for.
der Termindruck — the pressure of dates and deadlines.