The earliest Women's Days were held in the first part of the 20th century. This was before women could vote or legally terminate a pregnancy. It was also before Marie Curie became the first woman to win the Nobel Prize.
The following shocking statistics show why it's still important to celebrate this day more than a century later:
Globally, about one in three women will be beaten or raped during their lifetime.
On average, 30% of women who have been in a relationship report that they have experienced some form of physical or sexual violence by their partner.
A UN report says that 99.3% of women and girls in Egypt have been subjected to sexual harassment.
Over 130 million women living in the world today have undergone female genital mutilation.
Around 14 million girls, some as young as eight years old, will be married in 2014.
In 10 countries around the world women are still legally bound to obey their husbands.
In the UK, the gender pay gap is at 15% and women on average continue to earn less than their male colleagues.
Globally, only 24 percent of senior management positions are filled by women.
The Equalities and Human Rights Commission estimates it will take 70 years at our current rate of progress to see an equal number of male and female directors of FTSE 100 companies.
Gender inequality hurts everyone, not just women.
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This blog was taken and adapted from an article called "International Women's Day 2014: The shocking statistics that show why it is still so important" in The Independent at http://www.independent.co.uk/news/world/international-womens-day-2014-the-shocking-statistics-that-show-why-it-is-still-so-important-917721.