Misc: In Greek mythology, which goddess was Apollo's sister?

Questions

In 1945 ---------- liberated from Nazi occupation (National Day) ?

In 1949 North Atlantic Treaty Organization founded ( ---------- -- "OTAN" in French). ?

In 1960 ---------- National Day begins ?

In 1964 Beatles' " ---------- ," single goes #1 & stays #1 for 5 weeks ?

In 1968 Dr. Martin Luther King Jr shot to death in ---------- , Tennessee. ?