For Catholic and Anglican Christians, today marks the beginning of the penitential and fasting season of Lent. Orthodox Christians who follow the new calendar, began this past Sunday. It is a season where the individual believer is expected to give up a favourite food, or practice or habit - or in modern times to add some good practice usually avoided - so little children will give up candy for Lent - I know one adult who gives up the internet for Lent! You are also supposed to pray more, to be more charitable..... in short to engage in practices that focus you more on the spiritual life, and which reset and reboot your hard drive in a spiritual sense.
Here is a good short historical look at Lent:
Lent in History