Transcription factor that binds specifically to a 5'-AA[AG]G-3' consensus core sequence (By similarity). Regulates a photoperiodic flowering response. Transcriptional repressor of 'CONSTANS' expression. Circadian-regulation. Highly expressed at the beginning of the light period, then decreases, reaching a minimum between 16 and 29 hours after dawn before rising again at the end of the day. Early flowering.