CP violation in heavy-flavour decays

The CKM matrix is the only source of CP violation in the Standard Model.Heavy-flavour decays provide an ideal laboratory to test the CKM mechanism. Some recent highlights in CP violation in heavy-flavour decays from the LHCb and Belle II experiments are presented, including updated measurements of the CKM angles $\beta$, $\gamma$ and ${\phi }_s$, and new results in CP violation in charm decays.