Sources and method
7,935 events in 3,286 series. Rules are computed; schedules come from the people who set them; every event links to its source. Refreshed every night.
Where the dates come from
| Source | What | Refresh |
|---|---|---|
| Astronomy EngineComputed locally | Moon phases, full moon names, solstices and equinoxes, eclipses with Minnesota visibility, meteor shower peaks (IMO solar longitudes), planets | Nightly (extends the window) |
| Computus, Hebcal, Umm al-Qura, ICU Chinese calendarComputed locally | Western and Orthodox Christian feasts, Jewish holidays, Islamic dates, Lunar New Year and East Asian festivals | Nightly |
| Indian lunisolar calendarComputed locally | Hindu, Sikh and Jain festivals (tithi at the rule’s moment in New Delhi, checked against published dates for 2023 to 2026) | Nightly |
| Baha’i World CentreComputed locally | Baha’i holy days by the published rules | Nightly |
| Nager.DatePublic API | Public holidays in the US (with Minnesota) and 24 other countries | Nightly, one year of the window per night |
| Minnesota DNRSeason tables on dnr.state.mn.us | Fishing and hunting openers and deadlines | Nightly |
| Federal ReserveCalendar page | FOMC meetings | Nightly |
| United NationsList page | International days | Monthly, on the 1st |
| Wikipedia On this dayWikimedia REST API | Round-number anniversaries and birth anniversaries (notability from Wikidata) | Nightly, twelve days of the year at a time |
| Events (events.fru.dev)Public API | Flagship tech, data and AI conferences and Minnesota conferences | Nightly |
| Quarterly (quarterly.fru.dev)Public API | Earnings dates for 30 widely followed tech companies | Nightly |
| Organizers and WikipediaResearched and checked by script | Sports, elections, summits, awards and festivals; a date is kept only when the cited page states it | Nightly research agent when its keys work; lists re-checked by hand |
Coverage by year
| Category | 2023 | 2024 | 2025 | 2026 | 2027 | 2028 |
|---|---|---|---|---|---|---|
| Public holidays | 276 | 277 | 274 | 279 | 274 | 271 |
| Religion | 107 | 106 | 108 | 107 | 107 | 109 |
| Sky and space | 81 | 81 | 81 | 81 | 82 | 84 |
| Sports | 62 | 64 | 61 | 48 | 12 | 5 |
| Hunting, fishing and parks | 3 | 3 | 3 | 35 | 34 | 14 |
| Politics and government | 20 | 27 | 21 | 17 | 4 | 2 |
| History and anniversaries | 221 | 216 | 280 | 237 | 204 | 181 |
| People and birthdays | 145 | 155 | 150 | 144 | 143 | 150 |
| Culture and festivals | 23 | 25 | 24 | 24 | 13 | 8 |
| Observances | 257 | 257 | 257 | 257 | 257 | 257 |
| Academic | 3 | 3 | 3 | 9 | 10 | 1 |
| Economy and markets | 95 | 107 | 117 | 129 | 97 | 1 |
| Data and AI | 0 | 0 | 62 | 149 | 43 | 1 |
Method
- Computed dates are marked Computed (rule), name their method, and link the official page for the rule (the State Fair, the DNR, USCCB, Hebcal, the Umm al-Qura calendar, NASA). Sky events are in Central Time (Minnesota); the UTC instant is in the API.
- Islamic dates follow the Umm al-Qura calendar; local moon sighting can move them a day. Hindu, Sikh and Jain festivals follow the lunisolar calendar for New Delhi; regional almanacs can differ. Both are marked tentative.
- Researched events (sports, elections, summits, awards) are kept only when the cited page states the date; a script checks every one.
- Anniversaries come from Wikipedia’s On this day selection (25th, 50th, 75th, 100th and so on); birth anniversaries only for people known in at least 75 Wikipedia languages.
- The nightly research agent, when its keys work, reads recent announcements; its finds carry an Unverified badge until checked.
- Nothing is deleted. A moved date keeps its old value in the Changes history; a cancelled event stays, marked cancelled.
Sources: official schedules and published calendars, linked on every event; computed dates name their rule. Refreshed nightly.