Day Company (Private Joint Stock Company) was registered in Hamedan in 1337 AD with the number 93 and started its activity and activity in order to implement construction projects. Water, facilities and equipment and the 5th rank of industry and mining are from the Vice President for Strategic Supervision and is one of the most capable civil contractors in Iran.

During six decades of activity in the domestic and foreign arena, the company employs a high capacity of specialized manpower, machinery, advanced equipment and also significant financial capacity in the implementation of national development projects, including: construction of airport, dam, road, building, landscaping, Infrastructure and railways have achieved remarkable success. One of the important points of this company is the implementation of quality management systems, safety, occupational health and environment and subsequently obtaining the certificates: ISO 18001, ISO 9001 and ISO 14001 from the German company DQS.