World Embroidery Day was established by the Swedish Embroiderer’s Guild. This is more from their website,“In 2011 a local group belonging to Broderiakademin, Sweden’s Embroidery Guild, took the initiative to plan and create a special day to celebrate embroidery. World Embroidery Day was born. It is now celebrated annually, each year on July 30.”

From the manifesto:

We want to be part of a joyfully creative peace movement. […]

The importance of embroidery must be made known and World Embroidery Day will spread around the world.

Make 30th July a day filled with creativity for the sake of Peace, Freedom and Equality.

You can download a printable, PDF, English copy of the manifesto.