Observed minus calculated mid-transit times for HAT-P-25b, HAT-P-29b, HAT-P-31b, HAT-P-34b, HAT-P-35b, HAT-P-38b, HAT-P-42b, and HAT-P-43b. Measurements of this work in black, literature values included in our calculation in red. A black dashed line denotes the new ephemeris of this work with associated uncertainties in dotted lines. For comparison, the previous ephemeris of the discovery paper in blue. The offset between previous ephemeris and literature value for HAT-P-29b is caused by a timing offset corrected in Wang et al. (2018a); see text for details.