When Is The Ovulation Date With 25 Days Menstrual Cycle?

hi there im confused about which day i ovulate, my cycles are usually 25 days (the first day right up until the day before next one starts) so which day would i ovulate on? also last month my period was late and came on the 29th day so when did i ovulate? please help me as my husband and i are trying for our 2nd. thanks