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About Day Counting

Date math without a spreadsheet: days between two dates, adding days or months, business days with a holiday list you choose, countdowns, week numbers, the day of the year and exact age.

Who runs this site

Day Counting (daycounting.com) is operated by Anderson Gomes Ferreira. contato@daycounting.com

How it works

Dates are handled as calendar days, with no time of day and no time zone, so daylight saving time cannot change a result. Each page states how it counts (for example, that the start day counts and the end day does not).

Holiday lists are copied from the publisher’s own page, with the day we opened it. Events whose date moves (Thanksgiving, Mother’s Day, Father’s Day, Easter) are calculated from the rule, and the rule is shown on the page.

The tools run in your browser. The dates you type are not sent to our servers.

Where the data and rules come from

How we keep the content up to date

Every holiday list and rule shows its source and the date it was checked. Lists are reviewed when the publisher releases a new year.

What this site is not

Holiday lists exist only for 2026 and 2027 and only for the sets named on the page; outside them the tool warns you instead of counting zero. For payroll, contracts, court deadlines or visas, confirm the count with the official calendar of your employer, court or agency.

Get in touch

Found a mistake, have a question or a suggestion? See the channels on the contact.

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