| Holiday | Observed | Work Schedule | Charleston Gate Hours | Inland Port Greer | Inland Port Dillon |
| New Years Day 2023 | Monday, January 2 | Holiday Work Day* | 0700-1700 | Closed and Reopen @ 0600 on Jan 3 | CLOSED |
| Martin Luther King's Birthday | Monday, January 16 | Holiday Work Day* | 0500 - 1700 | Open | 0600 - 1800 |
| Presidents' Day | Monday, February 20 | Holiday Work Day* | 0500 - 1700 | Open | 0600 - 1800 |
| Good Friday | Friday, April 15 | Holiday Work Day* | 0500 - 1700 | Open | 0600 - 1800 |
| Memorial Day | Monday, May 29 | Holiday Work Day* | 0500 - 1700 | Open | 0600 - 1800 |
| Independence Day | Tuesday, July 4 | NO WORK DAY | CLOSED | Closes 0600 Tue and Opens 0600 Wed | CLOSED |
| Labor Day | Monday, September 4 | NO WORK DAY | CLOSED | Closes 1800 Sun and Opens 1800 Mon | CLOSED |
| Veterans Day | Friday, November 10 | Holiday Work Day* | 0500 - 1700 | Open | 0600 - 1800 |
| Thanksgiving | Thursday, November 23 | No Scheduled Gates | CLOSED | Close @ 0600 | CLOSED |
| Day After Thanksgiving | Friday, November 24 | Holiday Work Day* | 0500 - 1700 | Open @ 0600 | 0600 - 1800 |
| Christmas Eve | Sunday, December 24 | Reduced Gate Hours | CLOSED | Close @ 1500 | CLOSED |
| Christmas Day | Monday, December 25 | NO WORK DAY | CLOSED | Closed Reopens @ 0600 on Dec 26 | Closed and Reopens @ 0600 on Dec 6 |
| New Year's Eve | Sunday, December 31 | Reduced Gate Hours | CLOSED | Close @ 1500 | CLOSED |
| New Year's Day 2024 | Monday, January 1, 2024 | NO WORK DAY | CLOSED | Closed and Reopens @ 0600 on Jan 2 | Closed and reopens @ 0600 On Jan 2 |