You might have seen International Women's Day mentioned in the media or heard friends talking about it.
But what is this day for? When is it? Is it a celebration or a protest? Is there an equivalent International Men's Day? And what events will take place this year?
For more than a century people around the world have been marking 8 March as a special day for women.
It was Clara Zetkin, a communist activist and advocate for women's rights, who suggested the creation of an international day. She put her idea to an International Conference of Working Women in Copenhagen in 1910 - and the 100 women there, from 17 countries, agreed to it unanimously.