golang连接mysql时parseTime和loc是什么意思?

import (  "github.com/jinzhu/gorm"
  _ "github.com/jinzhu/gorm/dialects/mysql")func main() {
  db, err := gorm.Open("mysql", "user:password@/dbname?charset=utf8&parseTime=True&loc=Local")  defer db.Close()
}