Confused

At 12:00pm today it occurred to me that it was the National Day of Prayer.  We were driving so I began by telling the kids "Today is the National Day of Prayer.  We should pray for our country right now while we're driving." Lydia's answer was, "I know, mom."  I asked her how she knew and her reply was "we celebrated at school with nachos".  Me: "Ohhh, you celebrated Cinco de Mayo - not the National Day of Prayer.  Small mistake :)