The Thwing Center Postal Substation will be closed June 30-July 4 for the holiday. During the summer, hours are from 9 a.m. to 3:30 p.m. Monday through Thursday; it is closed on Fridays during the summer (until Aug. 19). Additionally, the substation is closed from 10:30 to 10:45 a.m. and from 1:15 to 2 p.m. for breaks. Regular hours (Monday-Friday) will resume Aug. 22.