Original: The 1950 - 1965 Pacific hurricane seasons all began on May 15, 1950-65 in the northeast Pacific Ocean and on June 1, 1950-65 in the central Pacific.
Simplified: The 1950-1969 Pacific hurricane seasons all began on May 15, 1950-69 in the northeast Pacific Ocean and on June 1, 1950-69 in the central Pacific.