Friday is a day of the week. In some countries, like the United States, it is the sixth day of the week. In other parts of the world, like the United Kingdom, it is said to be the fifth day of the week. Friday is the Sabbath for Muslims.
There is a superstition that a Friday on the 13th day of a month is unlucky. If the first day of a month is a Sunday, as it was in November 2015, the month will have a Friday the 13th. The next month like this will be May 2016.
Some people consider Friday to be the last day of the week before the weekend. Others see Friday night as part of the weekend, since work or school is over for the week. Because many people are happy to not have to go to work during the weekend, there are sayings like "Thank God it's Friday!".
Friday is named after Freyja.