Pregnancy weeks error

On the pregnancy part of the app it shows progress in terms of days and weeks gestation, however there is an error with how this progresses each week. It starts on Xw 1d, and ends on Xw 7d, however this should be Xw 0d and Xw 6d. It means that you don't see updates on the next week of pregnancy until the following day, rather than the true new week.