Walang nagsabi kung kelan best time to buy

Usually new models (or next year's models) will start to arrive at dealerships around Sept/Oct months.
Those times, present year's models will have a huge discount especially if the next year's models are already facelifted or a completely redesigned car.

OR when you are asking when is the right day of the month to buy, i'd suggest during the last weeks of the month when SAs need to move units in order to meet their quota.