January
- January 1 – New Year’s Day – Worldwide celebration marking the start of the year — great for party decorations and gifts. Calendarr
- January 19 (USA) – Martin Luther King Jr. Day – U.S. federal holiday. bianyou.com
February
- February 14 – Valentine’s Day – Gift day for loved ones (flowers, cards, chocolates etc.). Calendarr
- February 17–19 – Lunar New Year / Chinese New Year – Major celebration in East Asia and beyond; big for travel and gifts. TrueCalendar
March
- March 15 (Ireland/UK) – Mother’s Day – Many countries (including Ireland and UK) celebrate on this day. ClockZone+1
- March 17 – St. Patrick’s Day – Big in Ireland and Irish communities. ClockZone
April – Easter Season
- April 3 – Good Friday – Important in Christian countries. TrueCalendar
- April 5 – Easter Sunday – Central Christian holiday; egg hunts, decorations, gifts. TrueCalendar
- April 6 – Easter Monday – Public holiday in many countries. TrueCalendar
May
- May 1 – Labour / May Day – Public holiday in many countries. TrueCalendar
- May 5 – Cinco de Mayo – Festive cultural celebration (especially in the U.S.). GClocks
- May 10 – Mother’s Day (USA) – Date in the U.S. and many others differs from Irish/UK date. GClocks
- May 25 – Memorial Day (USA) – U.S. long weekend. GClocks
June
- June 8 – Pentecost – Christian celebration 50 days after Easter. GClocks
- June 14 – Flag Day (USA) – Patriotic observance. GClocks
- June 19 – Juneteenth (USA) – Newly recognized federal holiday. GClocks
- June 21 – Father’s Day – Widely celebrated, especially in Western countries. TrueCalendar+1
- June 21 – Summer Solstice – Seasonal celebration. GClocks
July
- **July 4 – Independence Day (USA) – Fireworks, parties, gifts and summer celebrations. GClocks
August
- August 15 – Assumption of Mary (Christian observance) – Important in many Catholic countries. GClocks
September
- September 1 / 7 – Labor Day (varies by country) – Holiday weekend in many places. GClocks
- September 7 – Grandparents’ Day (USA) – Celebrate grandparents with gifts. GClocks
October
- October 13 – Columbus Day (USA) – Federal holiday. GClocks
- October 31 – Halloween – Costumes, candy, decorations! Calendarr+1
November
- November 1 – All Saints’ Day – Christian observance; especially significant in some European countries. GClocks
- November 26 – Thanksgiving (USA) – Huge gift/food holiday. ClockZone
- November 27 – Black Friday – Shopping event with gifts and deals. GClocks
December
- December 8 – The Immaculate Conception – Celebrated in some countries. GClocks
- December 24 – Christmas Eve – Big night for gatherings and gift giving. ClockZone
- December 25 – Christmas Day – Central holiday for decorations and gifts worldwide. Calendarr+1
- December 31 – New Year’s Eve – End-of-year celebrations.