Pending natal solar arc sign changes:
Mercury ingress Libra, September 19, 2018
Midheaven ingress Sagittarius, October 17, 2018
Prior natal solar arc sign changes:
Mercury ingress Virgo, Septemer 10, 1987
Midheaven ingress Scorpio, October 8, 1987
September 25, 1987:
Varroa destructor found first time in the U.S.
(via “1987 in the United States” Wikipedia)