Wednesday, February 26, was Ash Wednesday, the day in which the Catholic Church and other traditions mark the beginning of Lent. The receiving of ashes on one's forehead that day is a sign of repentance of sin, much like the Day of Atonement (Yom Kippur) is for the Jewish faith. Lent, the forty days leading up to Easter, is a season for reflection of sin and repentance. Observers of this season will fast on Fridays and typically give up something they enjoy throughout the season.
Neither Ash Wednesday nor Lent are part of our Reformed tradition. Fasting and acts of penance are not bad, but we have historically refrained from traditions not commanded in Scripture. (Though one could point to Christmas and Easter as exceptions to the rule!) The main hesitancy of practicing rituals is that it can move our confidence from the completed work of our Lord over to our own works.
Having said all this, it is, nonetheless, helpful to our faith to be meditating upon the work of our Lord on the cross. You will see this taking place in worship, as not only the sermon series focuses on that work, but also the hymns. I encourage you to be reading and listening to devotions and sermons on the cross. Listen to music that leads you to Jesus' atoning work for you.
Here is love vast as the ocean,
Lovingkindness as a flood,
When the Prince of Life our ransom
Shed for us his precious blood.
Rev. D. Marion Clark