Ash wednesday
Today all over the world in catholic is known as ( ash wednesday)
2018
Ash Wednesday for the year 2018 is celebrated/ observed on Wednesday, February 14.
Ash Wednesday is always celebrated on a Wednesday seven weeks prior to Easter Sunday and the Day after Mardi Gras. For Christians, the day marks the first day of Lent and the starting of 6 weeks of fasting and penance.
More information on Ash Wednesday.Ash Wednesday derives its name from the practice of blessing ashes made from palm branches blessed on the previous year's Palm Sunday , and placing them on the heads of participants to the accompaniment of the words "Repent, and believe in the Gospel" or "Remember that you are dust, and to dust you shall return.
it is season of 
Fasting is a willing abstinence or reduction from some or all food , drink , or both, for a period of time. An absolute fast or dry fasting is normally defined as abstinence from all food and liquid for a defined period, usually a period of 24 hours, or a number of days. Water fasting allows drinking water but nothing else. Other fasts may be partially restrictive, limiting only particular foods or substances. A fast may also be intermittent in nature . Fasting practices may preclude intercourse and other activities as well as food