In Mysticism, Saturn entering Sagittarius, which occurs when the planet Saturn enters the constellation of Sagittarius, happens only once every thirty years.
It is believed to signal a shift towards themes like guiding principles and higher learning, and is expected to last for ~2.5 years.
For you, while you may be feeling pressure to define and stabilize some particular area of your life, stay patient as this period can help you hone in on some of the guiding principles that will carry you forward in your life.