"The only time to buy these is on a day with no "y" in it"

This quote by Warren Buffett is a funny method of saying that one should only purchase something when it is a bargain. He is recommending that one must not buy something even if it is offered, but instead await the right time to acquire it. The "y" in the quote is a referral to the word "yes," which implies that need to not be as well eager to claim yes to an acquisition. Rather, one must wait on the correct time to purchase something, when it is a bargain. This could imply waiting on a sale, or waiting on the ideal moment when the product is valued less than usual. By awaiting the correct time to acquire something, one can conserve cash and also obtain a much better offer.