| May 31Wed | ShavuotReligion · Judaism · to Jun 1 | – | annual | HebcalComputed (rule) | in 2 yr |
| Jun 1Thu | Pride MonthObservances · Heritage months · to Jun 30 | – | annual | Library of CongressComputed (rule) | in 2 yr |
| Madaraka Day (Kenya)Holidays · Kenya · Kenya | Kenya | annual | Nager.Date | in 2 yr |
| Global Day of ParentsObservances · UN international days | – | annual | United Nations | in 2 yr |
| Jun 2Fri | Take a Kid Fishing WeekendOutdoors · Fishing · to Jun 4 · Statewide | Statewide | annual | Minnesota DNR | in 2 yr |
| Republic Day (Italy)Holidays · Italy · Italy | Italy | annual | Nager.Date | in 2 yr |
| 150th anniversary: Anarchist Karl Nobiling attempted to assassinate German Emperor Wilhelm IHistory · Anniversaries | – | annual | Wikipedia | in 2 yr |
| 75th anniversary: Queen Elizabeth II was crowned at Westminster Abbey in LondonHistory · Anniversaries | – | annual | Wikipedia | in 2 yr |
| Jun 3Sat | Day of AshuraTentativeReligion · Islam | – | annual | Umm al-Qura calendarComputed (rule) | in 2 yr |
| Muskellunge season opens (MN)Outdoors · Fishing · Minnesota waters | Minnesota waters | annual | Minnesota DNR | in 2 yr |
| World Bicycle DayObservances · UN international days | – | annual | United Nations | in 2 yr |
| Jun 4Sun | Orthodox PentecostReligion · Orthodox Christianity | – | annual | Orthodox Church in AmericaComputed (rule) | in 2 yr |
| PentecostReligion · Christianity | – | annual | USCCB liturgical yearComputed (rule) | in 2 yr |
| Pentecost (Netherlands)Holidays · Netherlands · Netherlands | Netherlands | annual | Nager.Date | in 2 yr |
| Pentecost (Norway)Holidays · Norway · Norway | Norway | annual | Nager.Date | in 2 yr |
| Pentecost (Poland)Holidays · Poland · Poland | Poland | annual | Nager.Date | in 2 yr |
| Pentecost (Sweden)Holidays · Sweden · Sweden | Sweden | annual | Nager.Date | in 2 yr |
| Pentecost (Ukraine)Holidays · Ukraine · Ukraine | Ukraine | annual | Nager.Date | in 2 yr |
| International Day of Innocent Children Victims of AggressionObservances · UN international days | – | annual | United Nations | in 2 yr |
| Jun 5Mon | World Environment DayObservances · UN international days | – | annual | United Nations | in 2 yr |
| June Holiday (Ireland)Holidays · Ireland · Ireland | Ireland | annual | Nager.Date | in 2 yr |
| King's Birthday (New Zealand)Holidays · New Zealand · New Zealand | New Zealand | annual | Nager.Date | in 2 yr |
| Whit Monday (France)Holidays · France · France | France | annual | Nager.Date | in 2 yr |
| Whit Monday (Germany)Holidays · Germany · Germany | Germany | annual | Nager.Date | in 2 yr |
| Whit Monday (Netherlands)Holidays · Netherlands · Netherlands | Netherlands | annual | Nager.Date | in 2 yr |
| Whit Monday (Norway)Holidays · Norway · Norway | Norway | annual | Nager.Date | in 2 yr |
| International Day for the Fight against Illegal, Unreported and Unregulated FishingObservances · UN international days | – | annual | United Nations | in 2 yr |
| Jun 6Tue | Memorial Day (South Korea)Holidays · South Korea · South Korea | South Korea | annual | Nager.Date | in 2 yr |
| National Day of Sweden (Sweden)Holidays · Sweden · Sweden | Sweden | annual | Nager.Date | in 2 yr |
| Russian Language DayObservances · UN international days | – | annual | United Nations | in 2 yr |
| Jun 7Wed | Full moon: Strawberry MoonSky · Moon phases · 1:09 am CT | – | monthly | NASAComputed (rule) | in 2 yr |
| 400th anniversary: The Petition of Right, a major English constitutional document that set out...History · Anniversaries | – | annual | Wikipedia | in 2 yr |
| Prince, born 1958 (70 years)People · Birth anniversaries | – | annual | Wikipedia | in 2 yr |
| World Food Safety DayObservances · UN international days | – | annual | United Nations | in 2 yr |
| Jun 8Thu | World Oceans DayObservances · UN international days | – | annual | United Nations | in 2 yr |
| 75th anniversary: An F5 tornado struck Flint and Beecher, Michigan, causing 116 fatalities, 844...History · Anniversaries | – | annual | Wikipedia | in 2 yr |
| Jun 9Fri | UEFA Euro 2028Sports · Soccer · to Jul 9 · United Kingdom and Ireland | United Kingdom and Ireland | every few years | Wikipedia | in 2 yr |
| 100th anniversary: Australian aviator Charles Kingsford Smith and his crew landed the Southern...History · Anniversaries | – | annual | Wikipedia | in 2 yr |
| Miroslav Klose, born 1978 (50 years)People · Birth anniversaries | – | annual | Wikipedia | in 2 yr |
| Jun 10Sat | International Day for Dialogue among CivilizationsObservances · UN international days | – | annual | United Nations | in 2 yr |
| Jun 11Sun | Trinity SundayReligion · Christianity | – | annual | USCCB liturgical yearComputed (rule) | in 2 yr |
| International Day of PlayObservances · UN international days | – | annual | United Nations | in 2 yr |
| Jun 12Mon | 50th anniversary: American serial killer David Berkowitz, popularly known as the "Son of Sam",...History · Anniversaries | – | annual | Wikipedia | in 2 yr |
| Democracy Day (Nigeria)Holidays · Nigeria · Nigeria | Nigeria | annual | Nager.Date | in 2 yr |
| World Day Against Child LabourObservances · UN international days | – | annual | United Nations | in 2 yr |
| Jun 13Tue | John Forbes Nash Jr., born 1928 (100 years)People · Birth anniversaries | – | annual | Wikipedia | in 2 yr |
| International Albinism Awareness DayObservances · UN international days | – | annual | United Nations | in 2 yr |
| Jun 14Wed | Last quarter moonSky · Moon phases · 11:28 pm CT | – | monthly | NASAComputed (rule) | in 2 yr |
| World Blood Donor DayObservances · UN international days | – | annual | United Nations | in 2 yr |
| Jun 15Thu | 50th anniversary: King Hussein of Jordan married American Lisa HalabyHistory · Anniversaries | – | annual | Wikipedia | in 2 yr |
| Xi Jinping, born 1953 (75 years)People · Birth anniversaries | – | annual | Wikipedia | in 2 yr |
| Corpus Christi (Brazil)Holidays · Brazil · Brazil | Brazil | annual | Nager.Date | in 2 yr |
| Corpus Christi (Poland)Holidays · Poland · Poland | Poland | annual | Nager.Date | in 2 yr |
| Corpus ChristiReligion · Christianity | – | annual | USCCB liturgical yearComputed (rule) | in 2 yr |
| 150th anniversary: Eadweard Muybridge took a series of photographs to prove that all four feet of...History · Anniversaries | – | annual | Wikipedia | in 2 yr |
| World Elder Abuse Awareness DayObservances · UN international days | – | annual | United Nations | in 2 yr |
| Jun 16Fri | Youth Day (South Africa)Holidays · South Africa · South Africa | South Africa | annual | Nager.Date | in 2 yr |
| International Day of Family RemittancesObservances · UN international days | – | annual | United Nations | in 2 yr |
| Jun 17Sat | 1375th anniversary: Pope Martin I (pictured) was arrested in the Lateran Palace, Rome, and taken to...History · Anniversaries | – | annual | Wikipedia | in 2 yr |
| Anniversary of the Passing of General Martín Miguel de Güemes (Argentina)Holidays · Argentina · Argentina | Argentina | annual | Nager.Date | in 2 yr |
| World Day to Combat Desertification and DroughtObservances · UN international days | – | annual | United Nations | in 2 yr |
| Jun 18Sun | Father’s Day (US)Observances · Days | – | annual | US CodeComputed (rule) | in 2 yr |
| 75th anniversary: A Douglas C-124 Globemaster II aircraft crashed just after takeoff from...History · Anniversaries | – | annual | Wikipedia | in 2 yr |
| 75th anniversary: A Douglas C-124 Globemaster II aircraft crashed just after takeoff from...History · Anniversaries | – | annual | Wikipedia | in 2 yr |
| International Day for Countering Hate SpeechObservances · UN international days | – | annual | United Nations | in 2 yr |
| Sustainable Gastronomy DayObservances · UN international days | – | annual | United Nations | in 2 yr |
| Jun 19Mon | Juneteenth National Independence DayHolidays · United States · United States | United States | annual | Nager.Date | in 2 yr |
| 75th anniversary: Americans Julius and Ethel Rosenberg (pictured) were executed as spies for...History · Anniversaries | – | annual | Wikipedia | in 2 yr |
| Zoe Saldaña, born 1978 (50 years)People · Birth anniversaries | – | annual | Wikipedia | in 2 yr |
| International Day for the Elimination of Sexual Violence in ConflictObservances · UN international days | – | annual | United Nations | in 2 yr |
| Jun 20Tue | June solsticeSky · Solstices and equinoxes · 3:01 pm CT | – | annual | US Naval ObservatoryComputed (rule) | in 2 yr |
| Litha (Midsummer)Religion · Pagan and Wiccan | – | annual | Wheel of the YearComputed (rule) | in 2 yr |
| World Refugee DayObservances · UN international days | – | annual | United Nations | in 2 yr |
| General Manuel Belgrano Memorial Day (Argentina)Holidays · Argentina · Argentina | Argentina | annual | Nager.Date | in 2 yr |
| Frank Lampard, born 1978 (50 years)People · Birth anniversaries | – | annual | Wikipedia | in 2 yr |
| Martin Landau, born 1928 (100 years)People · Birth anniversaries | – | annual | Wikipedia | in 2 yr |
| Jun 21Wed | 900th anniversary: William Clito defeated Thierry of Alsace in a battle over the succession to the...History · Anniversaries | – | annual | Wikipedia | in 2 yr |
| Benazir Bhutto, born 1953 (75 years)People · Birth anniversaries | – | annual | Wikipedia | in 2 yr |
| International Day of YogaObservances · UN international days | – | annual | United Nations | in 2 yr |
| International Day of the Celebration of the SolsticeObservances · UN international days | – | annual | United Nations | in 2 yr |
| Jun 22Thu | New moonSky · Moon phases · 1:28 pm CT | – | monthly | NASAComputed (rule) | in 2 yr |
| Jun 23Fri | Midsummer Eve (Sweden)Holidays · Sweden · Sweden | Sweden | annual | Nager.Date | in 2 yr |
| International Widows' DayObservances · UN international days | – | annual | United Nations | in 2 yr |
| United Nations Public Service DayObservances · UN international days | – | annual | United Nations | in 2 yr |
| Jun 24Sat | Midsummer Day (Sweden)Holidays · Sweden · Sweden | Sweden | annual | Nager.Date | in 2 yr |
| International Day of Women in DiplomacyObservances · UN international days | – | annual | United Nations | in 2 yr |
| Jun 25Sun | 50th anniversary: The rainbow flag (original version pictured) representing gay pride was first...History · Anniversaries | – | annual | Wikipedia | in 2 yr |
| George Orwell, born 1903 (125 years)People · Birth anniversaries | – | annual | Wikipedia | in 2 yr |
| Alexei Abrikosov, born 1928 (100 years)People · Birth anniversaries | – | annual | Wikipedia | in 2 yr |
| Day of the SeafarerObservances · UN international days | – | annual | United Nations | in 2 yr |
| Jun 26Mon | Mercury at greatest western elongationSky · Planets | – | recurring | Astronomy EngineComputed (rule) | in 2 yr |
| 25th anniversary: The U.S. Supreme Court struck down sodomy laws in the country in the landmark...History · Anniversaries | – | annual | Wikipedia | in 2 yr |
| Paolo Maldini, born 1968 (60 years)People · Birth anniversaries | – | annual | Wikipedia | in 2 yr |
| International Day against Drug Abuse and Illicit TraffickingObservances · UN international days | – | annual | United Nations | in 2 yr |
| United Nations International Day in Support of Victims of TortureObservances · UN international days | – | annual | United Nations | in 2 yr |
| Jun 27Tue | 1350th anniversary: Pope Agatho, later venerated as a saint in both the Catholic and Eastern...History · Anniversaries | – | annual | Wikipedia | in 2 yr |
| International Day of DeafblindnessObservances · UN international days | – | annual | United Nations | in 2 yr |
| Micro-, Small and Medium-sized Enterprises DayObservances · UN international days | – | annual | United Nations | in 2 yr |
| Jun 28Wed | 50th anniversary: In Regents of the University of California v. Bakke, the U.S. Supreme Court...History · Anniversaries | – | annual | Wikipedia | in 2 yr |
| Constitution Day (Ukraine)Holidays · Ukraine · Ukraine | Ukraine | annual | Nager.Date | in 2 yr |
