 Popular cultural events include the National Folk Festival, the Royal Canberra Show, the Summernats car festival, Enlighten festival, the National Multicultural Festival in February and the "Celebrate Canberra" festival held over 10 days in March in conjunction with Canberra Day.Canberra maintains sister-city relationships with both Nara, Japan and Beijing, China.Canberra has friendship-city relationships with both Dili, East Timor and Hangzhou, China.