Guides
Plain-English explainers on holidays, calendars, time zones and date maths. Every guide is checked against the official rule and links to a tool that does the counting for you.
- US Federal Holidays 2027: Dates and Observed DaysAll 11 US federal holidays in 2027 with their weekdays and observed dates, the ten three-day weekends, and how the Saturday and Sunday rule works.
- Daylight Saving Time 2026–2027: When the Clocks ChangeDaylight saving time ends November 1, 2026 and starts March 14, 2027. See every US date through 2030, who doesn’t change the clocks, and how the…
How we check our guides
Dates come from the same engine that powers every tool, and each rule is traced to its official source: federal law for holidays, the IANA time zone database for clocks, and published calendars for lunar holidays. See our sources and our editorial and corrections policy.
Popular tools
- Days untilCount the days to any date or holiday.
- Weeks untilWeeks and days left until a date.
- Months untilWhole calendar months plus days to a date.
- Weekends untilHow many weekends are left before a date.
- Sleeps untilA countdown in nights — great for kids.
- Fortnights untilCount down in two-week periods.
- All countdownsEvery holiday countdown in one list.
- Date durationDays, weeks and months between two dates.