While your old solar year ended a week ago with the Sun's return to Pisces, Mercury stayed on for another week in order to finish closing old doors and laying old ghosts to rest. It's not only Mercury that leaves a nostalgic part of your chart today but the Moon as well, closing the doors to the past. Just a day before a solar eclipse is due to give your birthday month and new solar year a tailwind, there is no longer anything to be gained from looking back.