Lady for a Day (Columbia) is a Broadway sob story, highly effective because in it sentiment is used mainly as a springboard for comedy. Its heroine is a quaintly incredible old woman who sells apples on a Manhattan corner, guzzles too much gin, and corresponds with her daughter, whom she is sending to a Spanish convent, on the stationery of an expensive hotel. Apple Annie (May Robson) finds herself in a dilemma when her daughter (Jean Parker) writes to say that she has become engaged to a young Spanish grandee and that she is bringing him and his father, Count Romero (Walter Connolly), to Manhattan to meet her family.