Here are all the details of the day commemorating people who have no partner.
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Other important dates
Valentine's DayValentine's Day is a holiday to celebrate the love between couples and friends. Valentine's Day is observed on February 14 in almost every country.
Father's DayFather's Day is a celebration or homage dedicated to fathers. In general, the European Catholic tradition commemorates it on March 19, the feast of St. Joseph, Jesus's adoptive father.
Mother's DayMother's Day is the date when mothers from all over the world are honored. In Spain, it's observed on the first Sunday in May, although it's generally celebrated on the second Sunday of this month.