About
About The Calendar
Free calendar tools, holiday references, and step-by-step guides — built to be fast and answer the question on the first screen.
What this site is
The Calendar is a free reference site covering three things people search for every day: quick calendar tools, holiday dates, and step-by-step calendar guides. There's no sign-up, no app to install, and no upsell.
How we make money
This site is supported by display advertising and occasional affiliate links. Affiliate links are clearly marked. Ads never influence what we cover or how we explain it. If a tool we recommend goes downhill, we'll change the recommendation regardless of the affiliate relationship.
How we get our data
- US federal holidays — algorithmically generated per 5 U.S.C. § 6103. The same rules apply every year, so the dates are exact for any year past or future.
- Cultural calendars (Islamic, Hebrew, Chinese, lunar) — based on standard astronomical calculations. Local observances can vary by a day depending on moon-sighting; we note this on each page.
- Tools run entirely in your browser using JavaScript. Inputs never leave your device.
Corrections
Found an error? Drop a note via the contact page. We respond to corrections fast — usually same day.