The history and beginnings of Lent aren’t clear. According to Britannica.com, Lent has likely been observed: “since apostolic times, though the practice was not formalized until the First Council of Nicaea in 325 CE.” Christian scholars note that Lent became more regularized after the legalization of Christianity in A.D. 313. St. Irenaeus, Pope St. Victor I, and St. Athanasius all seem to have written about Lent during their ministries. Most agree that “by the end of the fourth century, the 40-day period of Easter preparation known as Lent existed, and that prayer and fasting constituted its primary spiritual exercises.”

Ash Wednesday marks the beginning of Lent, lent is a 40-day season not counting Sundays and is always 46days before Easter Sunday celebration . It is marked by repentance, fasting, reflection, and ultimately celebration. The 40-day period represents Christ’s time of temptation in the wilderness, where he fasted and where Satan tempted him. Lent requests that believers set aside a time each year for similar fasting, marking an intentional season of focus on Christ’s life, ministry, sacrifice, and resurrection.
Where does the Ash comes from and what is it’s significance.

Ash

The ashes are mostly prepared by burning palm branches gotten from the previous Palm Sunday. On Palm Sunday, churches bless and hand out palm branches to attendees, a reference to the Gospels’ account of Jesus’ triumphal entry into Jerusalem, when onlookers lay palm branches on his path.
The ashes symbolize two main things: 1. death and 2. repentance.
“Ashes are equivalent to dust, and human flesh is composed of dust or clay (Genesis 2:7), and when a human corpse decomposes, it returns to dust or ash.”
The Ash we collect is a means of saying sorry for our sins, and a symbol of committing ourselves in this season of Lent to correcting our faults, purify our hearts, control our desires and grow in holiness so we will be prepared to celebrate Easter with great joy. ( Catholic spirit)
With this focus on our own mortality and sinfulness, Christians can enter into the Lent season solemnly, while also looking forward in greater anticipation and joy of the message of Easter and Christ’s ultimate victory over sin and death.
What Are You Not Allowed to Eat on Ash Wednesday?
“In the early centuries fasting rules were strict, as they still are in Eastern churches,” notes Britannica.com. “One meal a day was allowed in the evening, and meat, fish, eggs, and butter were forbidden. The Eastern church also restricts the use of wine, oil, and dairy products. In the West, these fasting rules have gradually been relaxed. The strict law of fasting among Roman Catholics was dispensed with during World War II, and only Ash Wednesday and Good Friday are now kept as Lenten fast days.”
Verses to Reflect on for Ash Wednesday:
If you’d like to start thinking through and observing Lent and Ash Wednesday, here are a few verses specific to Ash Wednesday to meditate and reflect on, and then a prayer you can pray to observe the day.
Our Creation: Genesis 2:7 – Then the LORD God formed a man from the dust of the ground and breathed into his nostrils the breath of life, and the man became a living being.
Our Curse: Genesis 3:19 – By the sweat of your brow you will eat your food until you return to the ground, since from it you were taken; for dust you are and to dust you will return.”
Our Cry of Repentance: Psalm 51:7- 10: Cleanse me with hyssop, and I will be clean; wash me, and I will be whiter than snow. Let me hear joy and gladness; let the bones you have crushed rejoice. Hide your face from my sins and blot out all my iniquity. Create in me a pure heart, O God, and renew a steadfast spirit within me.

Source:

Christianity today

Time

The catholic spirit

Britannica

The gospel coalition