My sspx bulletin does not specify one way or the other. It does not acknowledge the feast day at all. So sad.
Neither does mine. Generally, with the exception of the Friday lenten abstinence, and Ash Wednesday/Good Friday fast/abstinence, anything above-and-beyond is devotional. And the SSPX accepts the 1983 code, so there's no real worry about observing the Solemnity as most other Catholics do these days.
"The declared enemies of God and His Church, heretics and schismatics, must be criticized as much as possible, as long as truth is not denied. It is a work of charity to shout: ‘Here is the wolf!’ when it enters the flock or anywhere else." -- Saint Francis de Sales
"For there shall be a time, when they will not endure sound doctrine; but, according to their own desires, they will heap to themselves teachers, having itching ears:" [2 Timothy 4:3]