Transparent by design
What Daymark knows, and what still needs checking
Every schedule has a boundary. Here’s the source, time range and confidence level behind each dataset, so you can tell when a result is enough for planning and when to confirm it locally.
11federal holidays tracked
49states with full holiday lists
22holiday guides
2026–2031calendar years published
Read the labels
Four levels of certainty
VerifiedMatched to a named primary or official source for the stated coverage period.
Rule-basedCalculated from a stable published recurrence or observance rule.
Planning estimateUseful forward-looking guidance that the responsible organization has not yet confirmed.
Local verificationNo single nationwide answer exists; the responsible local organization must be checked.
Current register
Sources and coverage
| Dataset | Coverage | Status | Primary reference and limits |
|---|---|---|---|
| Federal holiday calendar dates | 2026–2050 | Rule-based | U.S. Office of Personnel Management. Actual calendar dates are calculated from the published fixed-date and weekday rules. |
| Federal observed weekdays | 2026–2031 | Verified | U.S. Office of Personnel Management. Includes Friday and Monday weekend shifts and the Dec 31 observance when New Year’s Day falls on Saturday. |
| State holiday guides | All 50 states. Full lists: 49 states for 2026, 30 states for 2027. | Verified | Official state calendars, statutes or agency pages linked from each guide. Each year is labeled verified, rule-based (calculated from state law) or planning estimate (state not yet published). Entries do not promise that every local office closes. |
| Bank and Federal Reserve guidance | Planning guidance for 2026–2028 | Verified | Federal Reserve holiday schedules. Individual bank and branch policies can differ. |
| USPS operating guidance | 2026 confirmed; 2027–2028 planning markers | Planning estimate | USPS newsroom events and location tools. Later-year federal dates are explicitly labeled for verification until USPS publishes the schedule. |
| NYSE closures and early closes | 2026–2028 | Verified | NYSE Holidays & Trading Hours. Other exchanges, products and trading venues can use different schedules. |
| Public-school schedule guidance | Nationwide planning guidance | Local verification | Individual district and school calendars. There is no single U.S. public-school calendar. |
| Daylight saving time | 2026–2030 | Rule-based | U.S. Department of Transportation. Local exemptions and jurisdictions that do not observe daylight saving time are identified on the guide. |
| Full moon phase instants | 2026–2027 verified; 2028 calculated | Verified | U.S. Naval Observatory. 2028 instants are calculated with an astronomical algorithm that matches every 2026–2027 USNO entry to within one minute. |
| Annual calendars and printables | 2026–2031 | Rule-based | Daymark holiday data assembled from the sources above. Printable layouts use the same calendar-date data as the annual guides. |
| Super Bowl dates | LXI (2027) and LXII (2028) | Verified | NFL announcements. Listed only after the league confirms the date and venue. |
How updates are handled
- Annual refresh: rule-based dates, calendars and printables roll forward automatically with each build.
- Schedule refresh: organization-specific closures are added only after the organization publishes them.
- Expiry checks: every time-limited dataset has an end date, and the build warns before it runs out.
- Correction trail: a correction updates the page’s review date and this register.
What Daymark doesn’t claim
- A federal holiday doesn’t guarantee a private employer closes.
- A state entry doesn’t guarantee every state or local office closes.
- A “usually open” result doesn’t override weather, emergency or location notices.
- A downloaded calendar file is a snapshot; the subscribe link stays current.
Found a problem?
Help keep the calendar accurate
Send the date, the page and, if you can, a link to the official source. Corrections are checked against primary material first.