Lag b'Omer
/ˈlɑːgˈbəʊmə(r)/noun
- a Jewish festival held on the 33rd day of the Omer (the period between Passover and Pentecost), traditionally regarded as celebrating the end of a plague in the 2nd century八月节（犹太教节日, 逾越节和圣灵降临节之间七周斋期的第33天, 依据传统是庆祝公元2世纪一次瘟疫结束的活动）。
词源
from Hebrew lāḡ （pronunciation of the letters L （lamed） and G （gimel） symbolizing 33） + bā 'in the' + 'ōmer' （see OMER）.