The Apostles and Nicene Creeds are part of Catholic Teaching, no?
The church calendar would be considered part of either Catholic Teaching and/or Sacred Tradition I think?
Up until recently, mainline Reformed churches used the same lectionary as the Catholic Church. The āhigh churchā liturgy was largely similar.
This is an excerpt from a great book on prayer by a Protestant author (āPrayerā by Richard Foster):
āAfter the rigor and struggle of Saint Augustine, you may want to turn to the joyous simplicity of The Little Flowers of St. Francis. Join Francis, in adoration of God, the Creator of all things, by singing his āCanticle of the Sun,ā with its celebration of Brother Sun and Sister Moon, Brother Wind and Sister Water. Enjoy the marvelous stories of Brother Bernard and Sister Clare, of Brother Masseo and, my favorite, Brother Juniper. Marvel at the wisdom and good sense in the āSayings of Brother Giles.ā To one who was near despair at his dysfunctional behavior, Giles advises, āYou do right in grieving for your sin. However, I advise you to grieve moderately. For you must always believe that Godās power to forgive is greater than your power to sin.ā
And this is just the start for Reformed Protestants. Anglicans (also Protestant) go much, much deeper.
Generalizations are always fraught with peril. This is especially true with āProtestantsā - whatever that meansā¦