Khamis El Sakara is a Lebanese holiday. The name is from Lebanese Arabic, which means in English "Thursday of drunkness". It is celebrated on the last Thursday before the first day of Lent, when Lebanese Catholics gather and indulge in alcoholic beverages.
The origin of this day is "Khamis El Zakara", which means "Thursday of Remembering", a holiday when people remember their dead and pray for their souls. Lebanese tradition replaced the "Z" in Zakara with an "S", making the word "Sakara", and thus the holiday is now celebrated in both ways.
References
Khamis el sakara Wikipedia(Text) CC BY-SA