There is a Japanese holiday on May 5th called 「こどもの日」 (“Children’s Day”), but today (November 20th) is “Universal Children’s Day“.
The Japanese 「こどもの日」 (“Children’s Day”) holiday is a day for parents and grandparents to celebrate their children and hope for their future health and well-being.
Universal Children’s Day is different. As Wikipedia explains:
“…Universal Children’s Day is not simply a day to celebrate children for who they are, but to bring awareness to children around the globe that have succumbed to violence in forms of abuse, exploitation and discrimination…”
Japan does have an event for children around this time every November. For girls aged three and seven, and for boys aged five, Japanese celebrate 「七五三」 (“Shichi-Go-San”) (Click here to read my short explanation of it.)