Did you mean Advent? It is also a time of reflection and preparation. Those periods are a particular focus for inviting God more genuinely into our lives and of deepening our efforts to live the gospels, the authentic love that Jesus teaches, and to share more deeply in the Sacraments. Intrinsic to these developments is usually some sacrifice of our own wishes and comfort.
It isn’t always easy to be loving, nor always easy to read the gospels and epistles, nor to realign our hearts and activities to Christian ones, nor it is always easy to fully participate in the Sacraments, therefore Lent and Advent can be experienced as times of penance…but they remain primarily as periods of grace and deeper response to God’s call for us to be authentic Christians