Is the Pope required to proclaim Christ at all times?

[Vico]

Good afternoon. I have noticed that when Pope Francis addresses multifaith gatherings, he does not consistently proclaim Christ’s name. For example, please read his speech at the 9/11 Memorial and Museum in 2015; not once is Christ’s name mentioned. Is this acceptable? Thank you.

There is a time to provide witness.

Catechism

2464 The eighth commandment forbids misrepresenting the truth in our relations with others. This moral prescription flows from the vocation of the holy people to bear witness to their God who is the truth and wills the truth. Offenses against the truth express by word or deed a refusal to commit oneself to moral uprightness: they are fundamental infidelities to God and, in this sense, they undermine the foundations of the covenant.

Ecclesiastes 3

1 All things have their season, and in their times all things pass under heaven.
2 A time to be born and a time to die. A time to plant, and a time to pluck up that which is planted.
3 A time to kill, and a time to heal. A time to destroy, and a time to build.
4 A time to weep, and a time to laugh. A time to mourn, and a time to dance.
5 A time to scatter stones, and a time to gather. A time to embrace, and a time to be far from embraces.
6 A time to get, and a time to lose. A time to keep, and a time to cast away.
7 A time to rend, and a time to sew. A time to keep silence, and a time to speak.
8 A time of love, and a time of hatred. A time of war, and a time of peace.

Luke 8

11 Now the parable is this: The seed is the word of God. 12 And they by the way side are they that hear; then the devil cometh, and taketh the word out of their heart, lest believing they should be saved. 13 Now they upon the rock, are they who when they hear, receive the word with joy: and these have no roots; for they believe for a while, and in time of temptation, they fall away. 14 And that which fell among thorns, are they who have heard, and going their way, are choked with the cares and riches and pleasures of this life, and yield no fruit. 15 But that on the good ground, are they who in a good and perfect heart, hearing the word, keep it, and bring forth fruit in patience.