To get the most of your yearly horoscope and Monthly Horoscope, use the Horoscope maker to find the exact decan of your Sun, rising and Moon sign.
There are three decans per sign. Each decan is made up of 10º. They are divided up as follows.
Decan 1 = 0º up to (but not including) 10º
Decan 2 = 10º up to (but not including) 20º
Decan 3 = 20º up to (but not including) 30º
So for example if your Moon is at 9º 59′ Leo, it would still be in decan 1. Decan 2 starts from and including 10º. The dates given are for the Sun signs (Ie Birthdays) these change from year to year by 1 or 2 days, so check your 2018 ephemeris or 2019 ephemeris.