Closings and Holidays
2019
| January 1, 2019 | Tuesday | New Year’s Day | Closed all day |
| January 21, 2019 | Monday | Martin Luther King Jr. Day | Closed all day |
| February 18, 2019 | Monday | Presidents' Day | Closed all day |
| April 21, 2019 | Sunday | Easter Sunday | Closed all day |
| May 12, 2019 | Sunday | Mother's Day | Closed all day |
| May 26, 2019 | Sunday | Memorial Day Weekend | Closed all day |
| May 27, 2019 | Monday | Memorial Day | Closed all day |
| June 16, 2019 | Sunday | Begin Sunday Closings | Closed all day |
| July 4, 2019 | Thursday | Independence Day | Closed all day |
| September 2, 2019 | Monday | Labor Day | Closed all day |
| September 6, 2019 | Friday | East Northport Festival | East Northport building closes at 5:00 PM |
| September 7, 2019 | Saturday | East Northport Festival | East Northport building closed all day |
| September 15, 2019 | Sunday | Resume Sunday Openings | Open 1-5 |
| September 21, 2019 | Saturday | Cow Harbor Weekend | Northport building opens at 12:00 Noon |
| September 22, 2019 | Sunday | Cow Harbor Weekend | Northport building closed all day |
| October 14, 2019 | Monday | Columbus Day | Closed all day |
| October 19, 2019 | Saturday | Color Run | East Northport building opens at 12:00 Noon |
| November 11, 2019 | Monday | Veterans' Day | Closed all day |
| November 27, 2019 | Wednesday | Thanksgiving Eve | Closed at 5 PM |
| November 28, 2019 | Thursday | Thanksgiving Day | Closed all day |
| December 24, 2019 | Tuesday | Christmas Eve Day | Closed all day |
| December 25, 2019 | Wednesday | Christmas Day | Closed all day |
| December 31, 2019 | Tuesday |
New Year's Eve | Closed all day |