March 1, 2017
Ash Wednesday, which marks the start of Lent in the Christian calendar, has been observed by Britons for centuries. Its exact date changes every year, because it is determined by when Easter falls.
But it is always the day after Shrove Tuesday, or Pancake Day, and it always falls in February or March.
Christians who observe Lent use it as a time for prayer, penance and reflection.
By observing Lent, Christians are remembering the sacrifice of Jesus Christ, who withdrew into the wilderness and fasted for 40 days before his crucifixion.