Iniquity refers to moral corruption or wickedness. Biblically, it is often associated with deliberate sin or a deep-seated moral failing. For example, Psalm 51:2-3 speaks of iniquity as something that requires cleansing and forgiveness. Iniquity is seen as a distortion of God's goodness and a rebellion against His will.
Inequity, on the other hand, pertains to injustice or unfairness. It is more about societal or systemic wrongs rather than personal moral failings. While inequity might not always be a direct sin, it can result from sinful actions or attitudes, such as greed or oppression, and/or celebration of such.
In Christianity, the choice to "celebrate" either reveals much about one's spiritual state. Celebrating iniquity—embracing personal sin—can indicate a hardened heart, resistant to God's call for repentance and transformation. Conversely, celebrating inequity—ignoring or perpetuating injustice—might reflect a self-centered worldview that prioritizes personal comfort over God's command to love and serve others.
Ultimately, both iniquity and inequity are contrary to God's nature and His desire for humanity. A heart aligned with God seeks to reject both, striving for personal holiness and justice in the world.
I'll stick to celebrating Jesus, the Risen Saviour, you can have your day to celebrate your ideals for yourself.
Your calendar differs from mine... my emphasis stands. Yours?