Friday the 13th arrives again today - and we all know that means bad luck.
With the deadly coronavirus currently sweeping the globe, the sinister date's recurrence feels right on cue for the doom-and-gloom atmosphere of the moment as frantic shoppers stockpile hand sanitiser and brawl in supermarket aisles over the last multipack of Andrex.
The superstition surrounding Friday the 13th is thought to originate with the Last Supper, which was attended by 13 people - Jesus Christ and his 12 disciples - on Maundy Thursday, the night before his crucifixion by Roman soldiers on Good Friday.
The number 13 is therefore associated with Judas Iscariot, Christ's betrayer, and is regarded as imperfect when compared with 12, which represents the number of months in a year.
The union of day and date has also been traced back to King Philip IV of France arresting hundreds of Knights Templar on Friday 13 October 1307.
An irrational fear of the date is known as paraskevidekatriaphobia.
In Spanish-speaking countries and in Greece, it is Tuesday the 13th that frightens people. In Italy, it is Friday the 17th.
Other famous indicators of bad luck include a black cat crossing your path, breaking a mirror, walking under a ladder, opening an umbrella indoors and saying the name of Shakespeare's "Scottish play" in a theatre.