When Mary is out to dinner with Carl, and he's getting ready to dump her, his clothes keep changing from a pullover sweater and button-down shirt, to a jacket and button-down shirt.
Amy is in bed texting with Adrian who is in Paris during the day time. Paris is 6 hours ahead of New York and 9 hours a head of LA so Amy would have to be texting him early in the at 1 or 2 am at the minimum.
Early in the movie when Mary & James are texting he says to meet at Kimi's on Valentines Day. Later when Mary's telling the ride share driver her destination she tells him Kim's.
The capitol city in the establishing shot is not Sacramento but the ride-share car Mary uses has a California license plate.