Hello. Thank you for your message.
According to the information I have:
When no hormonal contraceptive has been used in the past month:
Start taking DIANE-35 on the first day of your cycle, i.e. the first day of menstrual bleeding. Take a tablet marked with that day of the week. For example, if your period starts on a Friday, take a tablet marked Friday. Then follow the days in order. *You may also start on days 2-5 of your cycle, but in that case make sure you also use an additional contraceptive method (barrier method) for the first 7 days of tablet-taking in the first cycle. If you have concerns, speak with your doctor.
More information from - Diane35 Consumer Medicine Information: