In 1946, in an effort to continue the company's post-war recovery, the name of all the stores were changed to 7-Eleven to adjust to the stores' new hours of operation, which were never known at the time. In 1969, 7-Eleven tried to do a 24-hour plan in Austin, Texas, after an Austin store stayed open all night to satisfy customer wants. Later on, 24-hour stores were created in Fort Worth and Dallas, Texas, as well as Las Vegas, Nevada. In 1971, Southland acquired convenience stores of the former Pak-A-Sak chain owned by Graham Allen Penniman, Sr. (1903–1985), of Shreveport, Louisiana.