Positive regulator for cold-responsive gene expression and cold tolerance. Part of a regulatory feedback loop that controls a subset of the circadian outputs and modulates the central oscillator. Negatively self-regulates its own expression. Circadian-regulation. Peak of transcript abundance near subjective dawn. Up-regulated transiently by light. No effect on the regulation of core clock associated genes or on the hypocotyl length, but hypersensitivity to freezing stress and slightly earlier-flowering phenotype. Rve1 and rve2 double mutant has no alteration in the period or phase of the clock. Rve1, rve2 and rve7 triple mutant has no alteration in the period or phase of the clock. Regulated at the level of mRNA maturation by RH42 (PubMed:23371945). The RVE2 pre-mRNA can be alternatively spliced, generating a poison cassette exon that harbors an very early in-frame premature termination codon. The resulting severely truncated mRNA is not efficiently translated (PubMed:22747664). Truncated N-terminus. Truncated N-terminus.