On the eve of Game 1 of the World Series, Mets fans are rallying Monday in Nassau County and in Queens.

Nassau County officials say their rally at the Theodore Roosevelt Executive and Legislative Building in Mineola starts at 5 p.m., and fans are encouraged to wear Mets jerseys and paint their faces in blue and orange.

The dome of the building will be lit in Mets colors, and former Mets players will be on hand, according to a news release from the office of County Executive Edward Mangano.

New Yorkers are encouraged to wear their orange and blue at another rally, from 3 to 5 p.m., at Queens Borough Hall on Queens Boulevard in Kew Gardens.

Former Mets players John Franco and Edgardo Alfonzo are scheduled to attend the Queens rally.

The Mets begin the World Series in Kansas City on Tuesday; their first home game is Friday.