If your work, family, or friendships span multiple countries or cultures, a calendar built only around one country's holidays misses a lot of what actually shapes the people around you. Building a globally-aware calendar isn't complicated, but it does take a bit more care than defaulting to whatever holidays your own country celebrates.
A Few Major International Observances Worth Knowing
Chinese New Year (January or February). The most important holiday in Chinese culture, traditionally celebrated over about two weeks. Because it follows the lunar calendar, the exact date shifts every year — it's worth checking rather than assuming last year's date.
Diwali (October or November). The Hindu Festival of Lights, celebrated over five days and symbolizing the victory of light over darkness. Like Chinese New Year, its date follows a lunar calendar and moves from year to year.
Eid al-Fitr and Eid al-Adha. Two major Islamic holidays observed by well over a billion people worldwide. Both follow the lunar Islamic calendar, so their dates shift by roughly eleven days earlier each year relative to the Gregorian calendar.
Hanukkah (usually November or December). The Jewish Festival of Lights, observed over eight nights, with dates set by the Hebrew calendar rather than the Gregorian one.
Building a Calendar With Global Awareness
Start with who the calendar is for. A calendar for a multicultural team, a mixed family, or an international client base should reflect the holidays actually relevant to those people — not just your own default cultural holidays plus a token addition.
Verify dates for the specific year. Lunar and lunisolar calendars mean many of the holidays above don't fall on the same Gregorian date each year. Whatever source you use, make sure it's current for the year you're actually planning.
Write descriptions with care. A one-line description that reduces a major cultural or religious observance to a stereotype does more harm than skipping the holiday entirely. If you're not deeply familiar with a tradition, a brief, factual description beats a colorful but inaccurate one.
Where to Get the Dates
CalendarBest's holiday calendars cover public and national holidays for ten countries — the United States, United Kingdom, Canada, Australia, Germany, France, Japan, China, India, and Brazil — including nationally observed holidays like Chinese New Year in China and Diwali in India, pulled directly into your calendar with one click. For religious observances that aren't official public holidays in a given country, or for verifying an exact lunar-calendar date for a specific year, a dedicated religious or cultural calendar resource is worth cross-checking alongside CalendarBest's country data.
Why This Is Worth the Extra Effort
Marking international holidays thoughtfully does real, practical work: it helps you plan multicultural events without accidentally scheduling over something significant, it signals respect for the traditions of people you work or live alongside, and it makes scheduling across time zones and cultural calendars noticeably less error-prone. None of that requires marking every holiday from every culture — it just requires being deliberate about the ones relevant to the people your calendar is actually for, and not assuming that the holidays you grew up with are the only ones that matter.