古往今来[kooukonrai] in all ages
古今[kokon] ancient and modern times
古今東西[kokontouzai] all times and places
古今無類[kokonmurui] best ever

今か今か[imakaimaka] eagerly waiting
今が今[imagaima] just now
今が今まで[imagaimamade] till just now
今しがた[imashigata] moment ago

夏衣[natsugoromo] summer clothes
夏羽織[natsubaori] summer haori (coat)
夏越し[natsugoshi] keeping over the summer
夏掛け[natsugake] summer-use futon
夏期学校[kakigakkou] summer school

夏期時間[kakijikan] daylight-saving time
夏期大学[kakidaigaku] university summer school
夏季休暇[kakikyuuka] summer vacation
夏菊[natsugiku] early chrysanthemums