Find US and international holidays for any year.
Holiday Lookup loads once and then runs on its own. Close the tab and there is nothing left behind, on the machine or anywhere else.
There is no account and no upload step. Whatever you paste lives in a variable until you close the tab, and then it does not.
You will find it under Calendars, alongside 5 other tools for the same sort of job.
Lists federal holidays with exact dates and day-of-week.
year: 2025 country: us
US Holidays 2025 ======================================== 2024-12-31 (Tue) New Year's Day 2025-01-20 (Mon) Martin Luther King Jr. Day 2025-02-17 (Mon) Presidents' Day 2025-05-26 (Mon) Memorial Day 2025-06-18 (Wed) Juneteenth 2025-07-03 (Thu) Independence Day 2025-09-01 (Mon) Labor Day 2025-10-13 (Mon) Columbus Day 2025-11-10 (Mon) Veterans Day 2025-11-27 (Thu) Thanksgiving 2025-12-24 (Wed) Christmas Day
Yes. It is JavaScript running in this tab, so once the page has loaded it needs nothing further from the network. Put the machine in flight mode and it carries on. Nothing you do here is sent anywhere, because there is nowhere for it to go.
No. Reload the page and it starts from nothing. There is no account, no saved state and no cookie holding your last session. That is a deliberate trade: it cannot lose your data because it never keeps any.
Timing comes from performance.now(), the high resolution clock the browser provides, rather than from setInterval, which drifts by a few milliseconds every tick and compounds over minutes. What can still shift things is the browser throttling a tab in the background, so leave it visible if the timing matters.
Where a sound makes sense, it is generated with the Web Audio API rather than loaded as a file, so there is nothing to download and nothing to block. Browsers refuse to start audio until you have interacted with the page, which is why the first press is what switches it on.
Yes. The controls are sized for touch and the layout collapses to one column on a narrow screen. Bear in mind that a phone locking its screen will suspend the page, and timing stops with it.