1. On March 7, 1855, the first territorial legislature of Kansas convened in Pawnee Indian Territory (now Fort Riley) with 39 members. This legislature attempted to draft a constitution for the new territory, but it was later rejected by the U.S. Congress.

2. In 1876, a major solar eclipse passed over Kansas on March 7. This event attracted many scientists and astronomers to the state, including Thomas Edison, who came to Topeka to observe the eclipse.

3. On March 7, 1895, the state of Kansas officially adopted the sunflower as its state flower. This decision was made after a statewide vote, and the sunflower was chosen because of its beauty and its association with the state's agricultural heritage.

4. In 1925, the city of Wichita, Kansas, hosted the first National Air Mail Week, which was celebrated across the country from May 15 to May 21. This event was intended to promote the use of air mail service, which had just been introduced by the U.S. Postal Service. The celebration in Wichita began on March 7 with a fly-over of the city by six planes carrying air mail.

5. On March 7, 1955, Vivian Vance, the actress who played Ethel Mertz on the television show "I Love Lucy," made a guest appearance at the Brown Grand Theatre in Concordia, Kansas. Vance was originally from Kansas and had studied at the University of Kansas before starting her acting career in New York.