When is Kids Day?

This morning for Mother's Day Olivia slept in until 8:30 which is not normal.  Corey let me sleep in, but he was trying to wake up Olivia so she would make me a Mother's Day card.  He tried waking her up but she was in such a deep sleep.  So when I finally came downstairs she said she was still making my card and I wasn't allowed to come to her until she was finished.  Then she gave me her card and said "Happy Mother's Day!"  She wrote the card herself and I read it and complimented her on her handwriting, etc.  Then she said "When is it Kid's Day?"  I thought that was funny!  I told her it's Kid's day everyday!