Hu et al. showed that ARID1A (AT-rich interactive domain-containing protein 1A), a key subunit of SWI/SNF complex, recruits FOXA1 (Forkhead Box A1) and TEAD4 to regulate ER binding on circadian rhythm genes in ER-positive endometrial cancer (Hu et al., 2020). This evidence concerns the gene ARID1A and endometrial cancer.