casual income; extraordinary revenue; incidental income; nonrecurring income; perquisite
temporary closure (of a shop, etc.); extra holiday; special holiday
news flash; news special; special newscast; special news bulletin
temporary employment or employee
special train; extra train
relief service (bus, train, etc.); interim service; additional service
extraordinary Diet session; extraordinary session of the Diet; session of the Diet convoked by the Cabinet by need or house request
extra (special) issue (e.g. of a magazine)
extraordinary meeting of the Cabinet
extraordinary Diet session; extraordinary session of the Diet; session of the Diet convoked by the Cabinet by need or house request
additional bus service; extra bus
long-term substitute teacher (filling in for someone on maternity or long-term sick leave)
chargé d'affaires ad interim; acting chargé d'affaires