The “early bird dinner” — enjoying your last meal of the day between 4 p.m. and 5 p.m. — has never been a popular option among Americans. The average dinner time in the States is 6:22 p.m., and many other countries enjoy the final meal of the day even later than that. But it’s time dining earlier gets a second glance — research shows that sitting down to supper before the sun goes down may have some perks.