Transcription activator that acts as a flowering master switch in both long and short days, independently of the circadian clock (By similarity). Promotes flowering upstream of HD1 by up-regulating FTL1, FTL4, FTL5, FTL6, EHD1, HD3A and RFT1 (By similarity). Seems to repress FTL11 expression (By similarity). May recognize the consensus motif 5'-TTTGTCGTAAT-3' in target gene promoters (By similarity).