Flag Day - From the June 14, 1951 "Just Thoughts of a Plain Country Woman" column: 

Flag Day is always June 14th.  We have three significant “flag days” in Spring and Summer:  Memorial Day, Flag Day and Independence Day.  All these days mark occasions when Americans might well re-dedicate themselves to the principles of honesty and decency in human affairs. 

Such principles, having brought us a long way, should do us no lesser service as we build hopefully for the future.