清明节：Tomb-sweeping Day/ Qingming Festival/ Ching Ming/ Chinese Memorial Day/Ancestors' Day
寒食：Cold Food Festival/ Hanshi Day/ the day before Pure Brightness when only cold food is served
扫墓：sweep a grave/ pay respect to a dead person at his tomb/ visit ones grave
祭祀：offer sacrifices. to the gods or the spirits of the dead
纸钱：spiritual money
先人：ancestor/ forefather
踏青：have an outing in spring
青团：Qingtuan: green dumplings made of glutinous rice and barley grass
出行高峰：travel peak