Below are holidays for the calendar year 2018 in the United States. Popular holidays are in bold.
| Date | Holiday | Details |
|---|---|---|
| – January 2018 – | ||
| Jan 1 – Monday | New Year’s Day 2018 | National holiday |
| Jan 6 – Saturday | Epiphany 2018 | Christian |
| Jan 7 – Sunday | Orthodox Christmas Day 2018 | Orthodox Christian |
| Jan 14 – Sunday | Orthodox New Year 2018 | Orthodox Christian |
| Jan 14 – Sunday | Makar Sankranti 2018 | Hindu |
| Jan 15 – Monday | Martin Luther King Day 2018 | National holiday |
| Jan 31 – Wednesday | Tu B’Shevat 2018 | Jewish |
| – February 2018 – | ||
| Feb 1 – Thursday | National Freedom Day 2018 | Observance |
| Feb 2 – Friday | National Wear Red Day 2018 | Observance |
| Feb 2 – Friday | Groundhog Day 2018 | Observance |
| Feb 12 – Monday | Lincoln’s Birthday 2018 | Observance |
| Feb 13 – Tuesday | Mardi Gras 2018 | Christian |
| Feb 14 – Wednesday | Ash Wednesday 2018 | Christian |
| Feb 14 – Wednesday | Maha Shivaratri 2018 | Hindu |
| Feb 14 – Wednesday | Lent 2018 | Christian |
| Feb 14 – Wednesday | Valentine’s Day 2018 | Observance |
| Feb 16 – Friday | Chinese New Year 2018 | Observance |
| Feb 19 – Monday | Presidents’ Day – Washington’s Birthday 2018 | National holiday |
| – March 2018 – | ||
| Mar 1 – Thursday | Purim 2018 | Jewish |
| Mar 2 – Friday | Holi 2018 | Hindu |
| Mar 2 – Friday | Read Across America Day 2018 | Observance |
| Mar 2 – Friday | Employee Appreciation Day 2018 | Observance |
| Mar 11 – Sunday | Daylight Saving Time – begins 2018 | Daylight Saving |
| Mar 17 – Saturday | St. Patrick’s Day 2018 | Observance |
| Mar 20 – Tuesday | Spring/Fall – March equinox 2018 | Season |
| Mar 25 – Sunday | Rama Navami 2018 | Hindu |
| Mar 25 – Sunday | Palm Sunday 2018 | Christian |
| Mar 29 – Thursday | Maundy Thursday 2018 | Christian |
| Mar 30 – Friday | Good Friday 2018 | Christian |
| Mar 31 – Saturday | Holy Saturday 2018 | Christian |
| Mar 31 – Saturday | Passover – Starts 2018 | Jewish |
| – April 2018 – | ||
| Apr 1 – Sunday | April Fools’ Day 2018 | Observance |
| Apr 1 – Sunday | Easter 2018 | Christian |
| Apr 2 – Monday | Easter Monday 2018 | Christian |
| Apr 6 – Friday | Orthodox Good Friday 2018 | Orthodox Christian |
| Apr 7 – Saturday | Passover – Final Day 2018 | Jewish |
| Apr 8 – Sunday | Orthodox Easter 2018 | Orthodox Christian |
| Apr 12 – Thursday | Yom Hashoah 2018 | Jewish |
| Apr 13 – Friday | Isra and Mi’raj 2018 | Muslim |
| Apr 13 – Friday | Thomas Jefferson Birthday 2018 | Observance |
| Apr 17 – Tuesday | Tax Day 2018 | Observance |
| Apr 17 – Tuesday | National Library Workers Day 2018 | Observance |
| Apr 22 – Sunday | Earth Day 2018 | Observance |
| Apr 25 – Wednesday | Administrative Professionals Day 2018 | Observance |
| Apr 26 – Thursday | Take our Daughters and Sons to Work Day 2018 | Observance |
| Apr 27 – Friday | Arbor Day 2018 | Observance |
| – May 2018 – | ||
| May 1 – Tuesday | May Day 2018 | Observance |
| May 1 – Tuesday | Laylat al Bara’at 2018 | Muslim |
| May 3 – Thursday | National Day of Prayer 2018 | Observance |
| May 3 – Thursday | Lag BaOmer 2018 | Jewish |
| May 5 – Saturday | Cinco de Mayo 2018 | Observance |
| May 6 – Sunday | National Nurses Day 2018 | Observance |
| May 10 – Thursday | Ascension Day 2018 | Christian |
| May 13 – Sunday | Mothers’ Day 2018 | Observance |
| May 15 – Tuesday | Peace Officers Memorial Day 2018 | Observance |
| May 16 – Wednesday | Ramadan starts 2018 | Muslim |
| May 19 – Saturday | Armed Forces Day 2018 | Observance |
| May 20 – Sunday | Shavuot 2018 | Jewish |
| May 20 – Sunday | Pentecost 2018 | Christian |
| May 21 – Monday | Whit Monday 2018 | Christian |
| May 22 – Tuesday | National Maritime Day 2018 | Observance |
| May 28 – Monday | Memorial Day 2018 | National holiday |
| May 31 – Thursday | Corpus Christi 2018 | Christian |
| – June 2018 – | ||
| Jun 6 – Wednesday | D-Day 2018 | Observance |
| Jun 11 – Monday | Laylat al Qadr 2018 | Muslim |
| Jun 14 – Thursday | Flag Day 2018 | Observance |
| Jun 15 – Friday | Eid al-Fitr 2018 | Muslim |
| Jun 17 – Sunday | Fathers’ Day 2018 | Observance |
| Jun 21 – Thursday | Summer/Winter Solstice 2018 | Season |
| – July 2018 – | ||
| Jul 4 – Wednesday | 4th of July – Independence Day 2018 | National holiday |
| Jul 14 – Thursday | Rath Yatra 2018 | Hindu |
| Jul 22 – Sunday | Parents Day 2018 | Observance |
| Jul 22 – Sunday | Tisha B’Av 2018 | Jewish |
| – August 2018 – | ||
| Aug 5 – Sunday | Friendship Day 2018 | Observance |
| Aug 15 – Wednesday | Assumption of Mary 2018 | Christian |
| Aug 19 – Sunday | National Aviation Day 2018 | Observance |
| Aug 21 – Tuesday | Day of Arafat 2018 | Muslim |
| Aug 21 – Tuesday | Senior Citizens Day 2018 | Observance |
| Aug 21 – Tuesday | Eid al-Adha 2018 | Muslim |
| Aug 25 – Saturday | Raksha Bandhan 2018 | Hindu |
| Aug 26 – Sunday | Women’s Equality Day 2018 | Observance |
| – September 2018 – | ||
| Sept 2 – Sunday | Krishna Janmashtami 2018 | Hindu |
| Sept 3 – Monday | Labor Day 2018 | National holiday |
| Sept 9 – Sunday | National Grandparents Day 2018 | Observance |
| Sept 12 – Wednesday | Muharram 2018 | Muslim |
| Sept 10 – Monday | Rosh Hashana 2018 | Jewish |
| Sept 11 – Tuesday | Patriot Day 2018 | Observance |
| Sept 12 – Wednesday | Ganesh Chaturthi 2018 | Hindu |
| Sept 17 – Monday | Constitution Citizenship Day 2018 | Observance |
| Sept 19 – Wednesday | Yom Kippur 2018 | Jewish |
| Sept 21 – Friday | Ashura 2018 | Muslim |
| Sept 23 – Sunday | Fall/ Spring – September equinox 2018 | Season |
| Sept 24 – Monday | Sukkot 2018 | Jewish |
| – October 2018 – | ||
| Oct 1 – Monday | Child Health Day 2018 | Observance |
| Oct 1 – Monday | Shemini Atzeret 2018 | Jewish |
| Oct 2 – Tuesday | Simchat Torah 2018 | Jewish |
| Oct 8 – Monday | Columbus Day 2018 | National holiday |
| Oct 9 – Tuesday | Leif Erikson 2018 | Observance |
| Oct 9 – Tuesday | Navratri 2018 | Hindu |
| Oct 16 – Tuesday | Boss’s Day 2018 | Observance |
| Oct 18 – Thursday | Dussehra 2018 | Hindu |
| Oct 31 – Wednesday | Halloween 2018 | Observance |
| – November 2018 – | ||
| Nov 1 – Thursday | All Saints’ Day 2018 | Christian |
| Nov 2 – Friday | All Souls Day 2018 | Christian |
| Nov 4 – Sunday | Daylight Saving Time – ends 2018 | Daylight Saving |
| Nov 7 – Wednesday | Diwali 2018 | Hindu |
| Nov 11 – Sunday | Veterans Day 2018 | National holiday |
| Nov 21 – Wednesday | The Prophet’s Birthday 2018 | Muslim |
| Nov 22 – Thursday | Thanksgiving Day 2018 | National holiday |
| Nov 23 – Friday | Black Friday 2018 | Observance |
| Nov 26 – Monday | Cyber Monday 2018 | Observance |
| – December 2018 – | ||
| Dec 2 – Sunday | Advent 2018 | Christian |
| Dec 3 – Monday | Hanukkah/Chanukah – Starts 2018 | Jewish |
| Dec 6 – Thursday | St Nicholas Day 2018 | Christian |
| Dec 7 – Friday | Pearl Harbor Remebrance Day 2018 | Observance |
| Dec 10 – Monday | Hanukkah/Chanukah – Final Day 2018 | Jewish |
| Dec 17 – Monday | Wright Brothers Day 2018 | Observance |
| Dec 21 – Friday | Winter/Summer Solstice 2018 | Season |
| Dec 24 – Monday | Christmas Eve 2018 | Christian |
| Dec 25 – Tuesday | Christmas Day 2018 | National holiday |
| Dec 26 – Wednesday | Kwanzaa -thru Jan 1 2018 | Observance |
| Dec 31 – Monday | New Years Eve 2018 | Observance |
