Budh (Mercury) mahadasha for Kanya (Virgo) 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 Mercury mahadasha lasts 17 years in full. Most people meet it partway through, so the part they live through can be shorter.

Mercury stands for thinking, speech, learning, trade and writing. Its period tends to favour study, skills, business and anything that runs on communication and quick judgement.

Counted from Virgo as the first house, Mercury rules Virgo and Gemini, your 1st and 10th houses. During its period the matters of both come forward:

The 1st house is you yourself: your direction, confidence and the way you meet the world. Its lord's period tends to put you at the centre of your own story and to favour fresh starts you choose for yourself.

The 10th house is career, standing and public life. Its lord's period tends to put work and responsibility in front, with chances to rise for those who carry them.

Mercury is itself the lord of Virgo. Its period tends to feel close to your own nature, and what it brings is usually easier to own and make use of.

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