Semester means the first six months or the second six months of a calendar year.
Date of Commercial Operation means the date on which the (nuclear or non-nuclear) power plant has successfully passed all performance and operational tests required by the end customer for commercial operation. In all other cases the warranty shall apply for twenty-four (24) months from delivery of the goods or performance of the services, or such longer period of time as customarily provided by Supplier, plus delays such as those due to non-conforming goods and services. The warranties shall apply to Buyer, its successors, assigns and the users of goods and services covered by this Order.
Contract Quarter means a three-month period that commences on January 1, April 1, July 1 or October 1 and ends on March 31, June 30, September 30, or December 31, respectively.
Calendar Year means each successive period of twelve (12) months commencing on January 1 and ending on December 31.
Gas Year means the period of 365 or 366 Gas Days, as the case may be, beginning at October 1st at 06:00 hours (Belgian time) and ending at October 1st 06:00 hours (Belgian time) of the next year.