April 15th, there are several noteworthy events that occurred. In 1825, empresario contracts were granted to Haden Edwards, Green DeWitt, and Robert Leftwich to encourage settlement in Coahuila and Texas. Fast forward to 1869, the U.S. Supreme Court ruled in the Texas v. White case that the state still had the right to sue in federal courts despite having seceded in 1861.
Moving on to more recent history, in 1956, Elvis Presley performed in San Antonio at the Municipal Auditorium, while in Austin, the French Legation was opened to the public. In 1972, the Texas Rangers played their first game, unfortunately losing to the California Angels.