Chandra (Moon) mahadasha for Mesha (Aries) 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 Moon mahadasha lasts 10 years in full. Most people meet it partway through, so the part they live through can be shorter.

The Moon stands for the mind, feelings, the mother and home. Its period tends to make family, comfort and moods more central, and brings more contact with people and the public.

Counted from Aries as the first house, Moon rules Cancer, your 4th house. During its period the matters of that house come forward:

The 4th house is home, mother, property, vehicles and peace of mind. Its lord's period tends to bring matters of the house and family to the front, including moves and changes at home.

Moon is neither friend nor enemy to Mars, the lord of Aries. Its period tends to give what you put into it; the planets' places in your own chart decide more than this relationship does.

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 Moon mahadasha, where the planet sits in your own chart and the sub-periods inside it shape the years more than your Moon sign alone.