Surya (Sun) mahadasha for Kumbha (Aquarius) Moon sign

In the Vimshottari system a life moves through nine long periods, each ruled by one planet. The planet that rules the period sets the tone of those years: the areas of life that come forward, and the kind of effort that pays.

The Sun mahadasha lasts 6 years in full. Most people meet it partway through, so the part they live through can be shorter.

The Sun stands for authority, confidence, the father and people in charge. Its period tends to bring questions of position and recognition, a wish to lead or to be seen for what you do, and dealings with seniors and public bodies.

Counted from Aquarius as the first house, Sun rules Leo, your 7th house. During its period the matters of that house come forward:

The 7th house is partners, marriage and dealings with other people. Its lord's period tends to bring partnerships forward, in marriage and in business, and to teach through other people.

Sun counts Saturn, the lord of Aquarius, as a natural enemy. Its themes may meet some friction with your temperament, so patience and a steady routine help the period give its best.

Which mahadasha you are in, and when it began, depends on the Moon's nakshatra at the moment you were born, so it is personal to you. Even within the Sun mahadasha, where the planet sits in your own chart and the sub-periods inside it shape the years more than your Moon sign alone.