动工日期 meaning in English

commencement date

Hyder - arup - black veatch joint venture design and construction
设计及建造工程动工日期：
Construction commencement date
工程动工日期：
The locations and areas of the various pieces of land earmarked for housing production during the period from 2002 - 03 to 2005 - 06 , together with the prospective commencement dates and estimated completion dates of the housing projects concerned ; and
期间，本港预留作建屋用地的地点和面积及有关建屋计划可动工日期及预计完成日期及