Where the myth of Friday the 13th that bad luck comes from is not entirely clear.
One theory is that it originated when Jesus was deceived by Judas, who was the 13th person at the table at the Last Supper.
And certainly many unfortunate things have happened on that particular date over the years.
Some examples are the stock market crash of 1927, Buckingham Palace which was bombed by the Nazis in 1940 and the cruise ship Costa Concordia which began to sink in 2012.
But if you look at the last 13 years and the 4 million claims that have been made, Friday the 13th stands out as a lucky date.
On average, 17 percent fewer injuries actually occur then than on any other day.
- You can imagine that you are more careful just because it is such an established shock that you should get into trouble right then, but it is just a speculation, no analysis, says Susanne Fagerberg, claims manager at Länsförsäkringar.
Tuesdays most accident-prone
Friday actually stands out in itself, without adding the 13th, as the least accident-prone day.
Instead, the statistics indicate that Tuesdays are the most accident-prone, especially the first of the month.
If you look at the whole year, we are in the statistically most damaged period, which is July and August.
Susanne Fagerberg connects it to travel and weather.
- On the one hand, you leave your home, which makes it a bit attractive for burglary, and in the summer, thunderstorms come with torrential rain.
Then it will be partly electronic products that are knocked out by the thunder, which can lead to fires and then heavy rains so there can be floods and water damage, says Susanne Fagerberg.