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NEW YORK ( TheStreet) -- Ignore the calendar and do the homework. That was Jim Cramer's advice to his "Mad Money" viewers Tuesday as he explained that trading based solely on what month it is is a total waste of time. Cramer said that these seasonal and monthly patterns grab people's attention and seem to be perfectly logical, but in reality, they're totally bogus and only work until they don't. The old adage that October is the most dangerous month for stocks no longer applies, said Cramer, and he outlined five reasons why. First, back when these patterns first emerged, the U.S. was in charge of its own destiny. But that's no longer the case, as the U.S. economy is forever linked to the well-being of China and Europe. Do the same patterns still hold true in the middle of a European financial crisis? Probably not. Second, these patterns never met a Federal Reserve willing to keep interest rates low by any means necessary. That changes the dynamic for all stocks, said Cramer. Next, there's Apple ( AAPL), a stock which he owns for his charitable trust,