Picture sourced here
The United Methodist Lectionary calls this Sunday Palm/Passion Sunday and offers two different sets of readings. I gather from Wiki that, in Roman Catholicism, until 1954, the name of the sixth Sunday of Lent was "Palm Sunday". In 1955, the name became, for 15 years only, "Second Sunday of the Passion or Palm Sunday". In 1970, it became "Palm Sunday of the Passion of the Lord". The sixth Sunday of Lent has thus never officially been given the exact name "Passion Sunday" and the term "Palm Sunday" is given first place in its present official name.
My practice has become to celebrate Palm Sunday in our morning services, and Passion Sunday at our evening service which marks the beginning of our Holy Week services