Black Friday Sale more than 50.000 users simultaneously accessed the site, temporarily causing delays and server overloads. The overwhelming numbers of visitors also caused the servers of several online shops, such as the electronics store Saturn, to suffer significant downtime. Despite the technical problems, the first Black Friday Sale generated a significant turnover and was considered a notable success by online retailers and organizers alike. After successfully launching in 2013, and having a successful 2014, 2015 and 2016, the Black Friday Sale is set to return on 24 November 2017. Online shoppers are expected to spend billions on this Black Friday sale. Once
Friday the 13th are on the 13th. The 13th day of the month is slightly more likely to be a Friday than any other day of the week. On average, there is a Friday the 13th once every 212.35 days, whereas Thursday the 13th occurs only once every 213.59 days. In the 2010s there were three Friday the 13ths in 2012 and 2015, and two in 2013, 2017 and 2018. There will also be two in 2019 and 2020. In the 2020s, there will be three F13's in 2026, and two in 2020, 2023, 2024, and 2029. The rest of years have at