GRU's Customer Service/Business Offices will be Closed on the Following Days: 2018 Holiday Observance Date(s) New Year's Day Holiday Monday, Jan. 1, 2018 Martin Luther King Jr. Day Monday, Jan. 15, 2018 Memorial Day Monday, May 28, 2018 Independence Day Wednesday, July 4, 2018 Labor Day Monday, Sept. 3, 2018 Veteran's Day Monday. Nov. 12, 2018 Thanksgiving Day Thursday, Nov. 22, 2018 Day after Thanksgiving Friday, Nov. 23, 2018 Additional Holiday Monday, Dec. 24, 2018 Christmas Day Tuesday, Dec. 25, 2018 2019 Holiday Observance Date(s) New Year's Day Tuesday, Jan. 1, 2019 Martin Luther King Jr. Day Monday, Jan. 21, 2019 Memorial Day Monday, May 27, 2019 Independence Day Thursday, July 4, 2019 Labor Day Monday, Sept. 2, 2019