Honcho Gatsuryo (or Honcho Getsurei) is the oldest remaining kuji-sho (a document about governmental operations and ceremonies) where, concerning annual events in the middle era of the Heian period, their origins, histories and contents are described.
本朝月令（ほんちょうがつりょう／ほんちょうげつれい）は、平安時代中期における年中行事の起源や沿革、内容を纏めた現存最古の公事書である。