Timeline of the 2012 Pacific hurricane season
The 2012 Pacific hurricane season was an above-average year for tropical cyclogenesis. The hurricane season officially began on May 15 in the east Pacific—defined as the region east of 140°W—and on June 1 in the central Pacific—defined as the region west of 140°W to the International Date Line—and ended on November 30 in both regions.
Source: Wikipedia — Timeline of the 2012 Pacific hurricane season (CC BY-SA 4.0)