| Sunday | January 01 2023 | New Year's Day | Federal Holiday |
| Monday | January 02 2023 | New Year's Day Observed | Federal Holiday |
| Friday | January 06 2023 | Epiphany | Christian |
| Saturday | January 07 2023 | Orthodox Christmas Day | Orthodox |
| Friday | January 13 2023 | Stephen Foster Memorial Day | Observance |
| Friday | January 13 2023 | Lee-jackson Day | State Holiday |
| Saturday | January 14 2023 | Orthodox New Year | Orthodox |
| Monday | January 16 2023 | Civil Rights Day | State Holiday |
| Monday | January 16 2023 | Martin Luther King Jr. Day | Federal Holiday |
| Monday | January 16 2023 | Idaho Human Rights Day | State Holiday |
| Thursday | January 19 2023 | Robert E. Lee's Birthday | State Holiday |
| Sunday | January 22 2023 | Chinese New Year | Observance |
| Sunday | January 29 2023 | Kansas Day | Observance |
| Wednesday | February 01 2023 | National Freedom Day | Observance |
| Thursday | February 02 2023 | Groundhog Day | Observance |
| Friday | February 03 2023 | National Wear Red Day | Observance |
| Sunday | February 05 2023 | Super Bowl | Sporting Event |
| Monday | February 06 2023 | Tu Bishvat/tu B'shevat | Jewish Holiday |
| Sunday | February 12 2023 | Lincoln's Birthday | Local Observance |
| Monday | February 13 2023 | Lincoln's Birthday Observed | State Holiday |
| Tuesday | February 14 2023 | Valentine's Day | Observance |
| Wednesday | February 15 2023 | Susan B. Anthony's Birthday | Local Observance |
| Thursday | February 16 2023 | Elizabeth Peratrovich Day | Local Observance |
| Saturday | February 18 2023 | Isra And Mi'raj | Muslim |
| Monday | February 20 2023 | Daisy Gatson Bates Day | State Holiday |
| Tuesday | February 21 2023 | Shrove Tuesday/mardi Gras | Observance, Christian |
| Wednesday | February 22 2023 | Ash Wednesday | Christian |
| Tuesday | February 28 2023 | Linus Pauling Day | Local Observance |
| Wednesday | March 01 2023 | St. David's Day | Observance, Christian |
| Thursday | March 02 2023 | Texas Independence Day | State Holiday |
| Thursday | March 02 2023 | Read Across America Day | Observance |
| Friday | March 03 2023 | Employee Appreciation Day | Observance |
| Tuesday | March 07 2023 | Purim | Jewish Holiday |
| Tuesday | March 07 2023 | Town Meeting Day | State Holiday |
| Sunday | March 12 2023 | Daylight Saving Time Starts | Clock Change/daylight Saving Time |
| Friday | March 17 2023 | St. Patrick's Day | Observance, Christian |
| Monday | March 20 2023 | March Equinox | Season |
| Thursday | March 23 2023 | Ramadan Starts | Muslim |
| Saturday | March 25 2023 | Maryland Day | Local Observance |
| Sunday | March 26 2023 | Prince Jonah Kuhio Kalanianaole Day | State Holiday |
| Monday | March 27 2023 | Seward's Day | State Holiday |
| Monday | March 27 2023 | Prince Jonah Kuhio Kalanianaole Day Observed | State Holiday |
| Wednesday | March 29 2023 | National Vietnam War Veterans Day | Observance |
| Sunday | April 02 2023 | Palm Sunday | Christian |
| Sunday | April 02 2023 | Pascua Florida Day | Local Observance |
| Monday | April 03 2023 | Pascua Florida Day Observed | Local Observance |
| Thursday | April 06 2023 | Maundy Thursday | Christian |
| Thursday | April 06 2023 | Passover (first Day) | Jewish Holiday |
| Thursday | April 06 2023 | National Tartan Day | Observance |
| Saturday | April 08 2023 | Holy Saturday | Christian |
| Sunday | April 09 2023 | Easter Sunday | Observance, Christian |
| Monday | April 10 2023 | Easter Monday | Observance, Christian |
| Tuesday | April 11 2023 | National Library Workers' Day | Observance |
| Thursday | April 13 2023 | Last Day Of Passover | Jewish Holiday |
| Thursday | April 13 2023 | Thomas Jefferson's Birthday | Observance |
| Friday | April 14 2023 | Orthodox Good Friday | Orthodox |
| Saturday | April 15 2023 | Orthodox Holy Saturday | Orthodox |
| Saturday | April 15 2023 | Father Damien Day | Local Observance |
| Sunday | April 16 2023 | Orthodox Easter | Orthodox |
| Monday | April 17 2023 | Boston Marathon | Sporting Event |
| Monday | April 17 2023 | Orthodox Easter Monday | Orthodox |
| Monday | April 17 2023 | Tax Day | Observance |
| Monday | April 17 2023 | Emancipation Day Observed | State Holiday |
| Monday | April 17 2023 | Patriot's Day | State Holiday |
| Monday | April 17 2023 | Lailat Al-qadr | Muslim |
| Tuesday | April 18 2023 | Yom Hashoah | Jewish Commemoration |
| Friday | April 21 2023 | San Jacinto Day | State Holiday |
| Saturday | April 22 2023 | Eid Al-fitr | Muslim |
| Saturday | April 22 2023 | Oklahoma Day | Local Observance |
| Wednesday | April 26 2023 | Yom Ha'atzmaut | Jewish Holiday |
| Wednesday | April 26 2023 | Confederate Heroes' Day | Local Observance |
| Wednesday | April 26 2023 | Administrative Professionals Day | Observance |
| Thursday | April 27 2023 | Take Our Daughters And Sons To Work Day | Observance |
| Friday | April 28 2023 | Arbor Day | State Holiday |
| Monday | May 01 2023 | Law Day | Observance |
| Monday | May 01 2023 | Loyalty Day | Observance |
| Monday | May 01 2023 | Lei Day | Local Observance |
| Thursday | May 04 2023 | National Day Of Prayer | Observance |
| Thursday | May 04 2023 | Rhode Island Independence Day | Local Observance |
| Thursday | May 04 2023 | Kent State Shootings Remembrance | Local Observance |
| Friday | May 05 2023 | Cinco De Mayo | Observance |
| Friday | May 05 2023 | Kentucky Oaks | Sporting Event |
| Saturday | May 06 2023 | National Nurses Day | Observance |
| Saturday | May 06 2023 | National Explosive Ordnance Disposal (eod) Day | Observance |
| Saturday | May 06 2023 | Kentucky Derby | Sporting Event |
| Monday | May 08 2023 | Truman Day | State Holiday |
| Monday | May 08 2023 | Victory In Europe Day | Observance |
| Tuesday | May 09 2023 | Lag Baomer | Jewish Holiday |
| Wednesday | May 10 2023 | Confederate Memorial Day | Local Observance |
| Friday | May 12 2023 | Military Spouse Appreciation Day | Observance |
| Sunday | May 14 2023 | Mother's Day | Observance |
| Monday | May 15 2023 | Peace Officers Memorial Day | Observance |
| Thursday | May 18 2023 | Ascension Day | Christian |
| Friday | May 19 2023 | National Defense Transportation Day | Observance |
| Saturday | May 20 2023 | Armed Forces Day | Observance |
| Saturday | May 20 2023 | Preakness Stakes | Sporting Event |
| Monday | May 22 2023 | National Maritime Day | Observance |
| Monday | May 22 2023 | Harvey Milk Day | Local Observance |
| Wednesday | May 24 2023 | Emergency Medical Services For Children Day | Observance |
| Thursday | May 25 2023 | National Missing Children's Day | Observance |
| Friday | May 26 2023 | Shavuot | Jewish Holiday |
| Sunday | May 28 2023 | Pentecost | Christian |
| Monday | May 29 2023 | Whit Monday | Christian |
| Monday | May 29 2023 | Memorial Day | Federal Holiday |
| Thursday | June 01 2023 | Statehood Day | Local Observance |
| Sunday | June 04 2023 | Trinity Sunday | Christian |
| Monday | June 05 2023 | Jefferson Davis' Birthday | State Holiday |
| Tuesday | June 06 2023 | D-day | Observance |
| Thursday | June 08 2023 | Corpus Christi | Christian |
| Saturday | June 10 2023 | Belmont Stakes | Sporting Event |
| Sunday | June 11 2023 | Kamehameha Day | State Holiday |
| Sunday | June 11 2023 | Bunker Hill Day | Local Observance |
| Monday | June 12 2023 | Kamehameha Day Observed | State Holiday |
| Wednesday | June 14 2023 | Army Birthday | Observance |
| Wednesday | June 14 2023 | Flag Day | Observance |
| Sunday | June 18 2023 | Father's Day | Observance |
| Monday | June 19 2023 | Juneteenth | Local Observance |
| Tuesday | June 20 2023 | West Virginia Day | State Holiday |
| Tuesday | June 20 2023 | American Eagle Day | Observance |
| Wednesday | June 21 2023 | June Solstice | Season |
| Thursday | June 29 2023 | Eid Al-adha | Muslim |
| Tuesday | July 04 2023 | Independence Day | Federal Holiday |
| Thursday | July 13 2023 | Nathan Bedford Forrest Day | Local Observance |
| Friday | July 14 2023 | Bastille Day | Observance |
| Wednesday | July 19 2023 | Muharram | Muslim |
| Sunday | July 23 2023 | Parents' Day | Observance |
| Monday | July 24 2023 | Pioneer Day | State Holiday |
| Thursday | July 27 2023 | National Korean War Veterans Armistice Day | Observance |
| Thursday | July 27 2023 | Tisha B'av | Jewish Holiday |
| Tuesday | August 01 2023 | Colorado Day | Local Observance |
| Friday | August 04 2023 | Coast Guard Birthday | Observance |
| Monday | August 07 2023 | Purple Heart Day | Observance |
| Monday | August 14 2023 | Victory Day | State Holiday |
| Tuesday | August 15 2023 | Assumption Of Mary | Christian |
| Wednesday | August 16 2023 | Bennington Battle Day | State Holiday |
| Friday | August 18 2023 | Hawaii Statehood Day | State Holiday |
| Saturday | August 19 2023 | National Aviation Day | Observance |
| Monday | August 21 2023 | Senior Citizens Day | Observance |
| Saturday | August 26 2023 | Women's Equality Day | Observance |
| Sunday | August 27 2023 | Lyndon Baines Johnson Day | State Holiday |
| Monday | September 04 2023 | Labor Day | Federal Holiday |
| Saturday | September 09 2023 | California Admission Day | Local Observance |
| Saturday | September 09 2023 | Carl Garner Federal Lands Cleanup Day | Observance |
| Sunday | September 10 2023 | National Grandparents Day | Observance |
| Monday | September 11 2023 | Patriot Day | Observance |
| Friday | September 15 2023 | National Pow/mia Recognition Day | Observance |
| Saturday | September 16 2023 | Rosh Hashana | Jewish Holiday |
| Sunday | September 17 2023 | Constitution Day And Citizenship Day | Observance |
| Monday | September 18 2023 | Air Force Birthday | Observance |
| Monday | September 18 2023 | Constitution Day And Citizenship Day Observed | Observance |
| Friday | September 22 2023 | Native American Day | Local Observance |
| Friday | September 22 2023 | Emancipation Day | Local Observance |
| Saturday | September 23 2023 | September Equinox | Season |
| Sunday | September 24 2023 | Gold Star Mother's Day | Observance |
| Monday | September 25 2023 | Yom Kippur | Jewish Holiday |
| Wednesday | September 27 2023 | The Prophet's Birthday | Muslim |
| Saturday | September 30 2023 | First Day Of Sukkot | Jewish Holiday |
| Monday | October 02 2023 | Child Health Day | Observance |
| Wednesday | October 04 2023 | Feast Of St Francis Of Assisi | Christian |
| Friday | October 06 2023 | Last Day Of Sukkot | Jewish Holiday |
| Saturday | October 07 2023 | Shmini Atzeret | Jewish Holiday |
| Sunday | October 08 2023 | Simchat Torah | Jewish Holiday |
| Monday | October 09 2023 | Leif Erikson Day | Observance |
| Monday | October 09 2023 | Columbus Day | Local Observance |
| Monday | October 09 2023 | Native Americans' Day | Local Observance |
| Friday | October 13 2023 | Navy Birthday | Observance |
| Sunday | October 15 2023 | White Cane Safety Day | Observance |
| Monday | October 16 2023 | Boss's Day | Observance |
| Wednesday | October 18 2023 | Alaska Day | State Holiday |
| Saturday | October 21 2023 | Sweetest Day | Observance |
| Friday | October 27 2023 | Nevada Day | State Holiday |
| Tuesday | October 31 2023 | Halloween | Observance |
| Wednesday | November 01 2023 | All Saints' Day | Christian |
| Thursday | November 02 2023 | All Souls' Day | Christian |
| Sunday | November 05 2023 | Daylight Saving Time Ends | Clock Change/daylight Saving Time |
| Sunday | November 05 2023 | New York City Marathon | Sporting Event |
| Friday | November 10 2023 | Marine Corps Birthday | Observance |
| Friday | November 10 2023 | Veterans Day Observed | Federal Holiday |
| Saturday | November 11 2023 | Veterans Day | Federal Holiday |
| Thursday | November 23 2023 | Thanksgiving Day | Federal Holiday |
| Friday | November 24 2023 | Day After Thanksgiving | State Holiday |
| Friday | November 24 2023 | Family Day | State Holiday |
| Friday | November 24 2023 | State Holiday | State Holiday |
| Friday | November 24 2023 | Acadian Day | State Holiday |
| Friday | November 24 2023 | Presidents' Day | State Holiday |
| Friday | November 24 2023 | Black Friday | Observance |
| Friday | November 24 2023 | Lincoln's Birthday/lincoln's Day | State Holiday |
| Friday | November 24 2023 | American Indian Heritage Day | State Holiday |
| Monday | November 27 2023 | Cyber Monday | Observance |
| Friday | December 01 2023 | Rosa Parks Day | Local Observance |
| Sunday | December 03 2023 | First Sunday Of Advent | Christian |
| Wednesday | December 06 2023 | St Nicholas Day | Observance |
| Thursday | December 07 2023 | Pearl Harbor Remembrance Day | Observance |
| Friday | December 08 2023 | Feast Of The Immaculate Conception | Christian |
| Friday | December 08 2023 | Chanukah/hanukkah (first Day) | Jewish Holiday |
| Tuesday | December 12 2023 | Feast Of Our Lady Of Guadalupe | Christian |
| Wednesday | December 13 2023 | National Guard Birthday | Observance |
| Friday | December 15 2023 | Last Day Of Chanukah | Jewish Holiday |
| Friday | December 15 2023 | Bill Of Rights Day | Observance |
| Sunday | December 17 2023 | Pan American Aviation Day | Observance |
| Sunday | December 17 2023 | Wright Brothers Day | Observance |
| Thursday | December 21 2023 | December Solstice | Season |
| Sunday | December 24 2023 | Christmas Eve | Observance, Christian |
| Monday | December 25 2023 | Christmas Day | Federal Holiday |
| Tuesday | December 26 2023 | Kwanzaa (first Day) | Observance |
| Tuesday | December 26 2023 | Day After Christmas Day | State Holiday |
| Sunday | December 31 2023 | New Year's Eve | Observance |