An appropriately rich Reformed sacramentalism also renders Ash Wednesday irrelevant. Infant baptism emphasizes better than anything else outside of the preached Word the priority of God’s grace and the helplessness of sinless humanity in the face of God. The Lord’s Supper, both in its symbolism (humble elements of bread and wine) and its meaning (the feeding on Christ by faith) indicates our continuing weakness, fragility and utter dependence upon Christ.
In light of this, I suspect that the reasons evangelicals are rediscovering Lent is as much to do with the poverty of their own liturgical tradition as anything. American evangelicals are past masters at appropriating anything that catches their fancy in church history and claiming it as their own, from the ancient Fathers as the first emergents to the Old School men of Old Princeton as the precursors of the Young, Restless, and Reformed to Dietrich Bonhoeffer as modern American Evangelical. Yet if your own tradition lacks the historical, liturgical and theological depth for which you are looking, it may be time to join a church which can provide the same.
—Carl Trueman, Ash Wednesday: Picking And Choosing Our Piety