A Jubilee year is a sign of reconciliation because it establishes a “favorable time” (cf. 2 Corinthians 6:2) for conversion. We are called to put God at the center of our lives, growing toward Him and acknowledging His primacy. Even the Biblical call for the restoration of social justice and respect for the earth stems from a theological reality: if God is the creator of the universe, He must be given priority over every reality and partisan interest. It is God who makes this year holy by bestowing on us His own holiness.
As Pope Francis recalled in the 2015 Bull proclaiming the Extraordinary Holy Year, “Mercy is not opposed to justice but rather expresses God’s way of reaching out to the sinner, offering him a new chance to look at himself, convert, and believe. […] God’s justice is his mercy given to everyone as a grace that flows from the death and resurrection of Jesus Christ. Thus, the Cross of Christ is God’s judgement on all of us and on the whole world, because through it he offers us the certainty of love and new life” (Misericordiae Vultus, 21).
In practical terms, reconciliation involves receiving the sacrament of Reconciliation, taking advantage of this time to rediscover the value of confession, and experiencing God's personal words of forgiveness. There are some Jubilee churches that stay open continuously to make available the sacrament of Reconciliation. You can prepare yourself to receive the sacrament by following a guide.