Ode XI
“Seize the day” is probably the best known translation of “Carpe diem” (maybe because of this fantastic scene from Dead Poet’s Society?). Some other translations of Horace’s verse (from Ode XI) include “Harvest the day”,”Pluck the day” and “Snatch the sleeve of to-day.”
The point is to take advantage of the present as much as doable.
This is one translation of the Ode from 1865. (complete book here)