When Does The Age Of Aquarius Begin?

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Remember the lyrics of 'Aquarius' by the cast of the musical Hair? When the moon is in the Seventh House and Jupiter aligns with Mars, then peace will guide the planets and love will steer the stars. This is the dawning of the age of Aquarius, the age of Aquarius. When does the Age of Aquarius begin? And what is the Age of Aquarius?