Busy mos. in retail, 4 letters
Christmas times: Abbr., 4 letters
Day of infamy, to FDR, 4 letters
Fourth qtr. enders, 4 letters
Holiday mos., 4 letters
Nov. followers, 4 letters
VAX computers, e.g., 4 letters
Winter mos., 4 letters
Winters begin in them; Abbr., 4 letters