From Wikipedia we learn that:

The Pig (豬) is the twelfth of the 12-year cycle of animals which appear in the Chinese zodiac related to the Chinese calendar.  According to the myths, the Pig was the last to arrive when the Jade Emperor called for the great meeting. Other sources said that Buddha called for a great meeting when he was about to leave the Earth. The Pig came in last.

The natural element of the Pig is Water. Thus, it is commonly associated with emotions and intuitions. 
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The Chinese New Year in 2019 is February fifth: this corresponds with the beginning of both the sexagenary year of jǐ hài and also the zodiac year of the Earth Pig.