When and what is Children's Day in Uruguay?

Every year on one Sunday in August there is a commercially known day as Children's Day in Uruguay.  You may notice that supermarkets are starting to stock lots of toys on their shelves at the moment, it is because Children's Day is on Sunday 2 August.  Often described by my Uruguayan friends as a day 'bigger than Christmas', children are showered with gifts on Children's Day here in Uruguay.  I personally don't 'celebrate' Children's Day but I know it is popular with Uruguayans.  One tip I can give you is that the best toy selection in Uruguay is at this time of year so stock up now for Christmas and future Birthdays/occasions :)