It could be a wet, wet New Year’s Day in Southern California. But Pasadena’s enviable record of dry Rose Parades should stand, thanks to a “Never on Sunday” rule dating back to the 19th century, officials said Tuesday. A cold front from the north should bring rain to Los Angeles on Saturday, stretching into Sunday, Jan. 1, the National Weather Service forecast. But for only the 15th time in its 128-year history, the Rose Parade will be moved to Monday, Jan. 2, sparing thousands of spectators a soggy vigil.