The regular opening and closing hours of the physical training buildings will not be in operation tomorrow because of the holiday, according to an announcement made yesterday by the Physical Training Department. The hours when the buildings may be used are as follows: the Hemenway Gymnasium will be open from 9 o'clock in the morning until 6 o'clock in the evening: the University Squash Courts, the Big Tree Swimming Pool, and the Freshman Athletic Building, each will be open from 2 until 6 o'clock in the afternoon.