Active-duty military service members and veterans will get free parking at state parks through the end of December, Gov. Bob McDonnell (R) said Wednesday.

Admission to state parks is free in Virginia but some parks charge for parking. McDonnell said all visitors will get to park for free June 13 through 19 and veterans and military members will get the free parking through Dec. 31, part of a celebration of the 75th anniversary of the Virginia park system.

Veterans will have to show either a retired military ID card or a standard discharge form to get the perk. Active duty military members and their family members will have to show a Defense Department issued ID.

“This is a small gesture of appreciation for the women and men who have given so much to defend our liberty and freedom,” McDonnell said in a statement.

Virginia’s park system was founded on June 15, 1936 and draws an estimated 8 million visitors each year.