A free, precise date and time calculator built for the real world. Add or subtract days, weeks, months and working days from any date — with public holiday awareness across 21 countries. Whether you're managing international project deadlines, calculating contract notice periods, or coordinating across time zones, this tool gives you accurate results that generic calculators simply can't match.
Date & period
Direction
Add / subtract
Options
Holiday countries
🇦🇺Australia✓
🇧🇷Brazil✓
🇨🇦Canada✓
🇨🇳China✓
🇫🇮Finland✓
🇫🇷France✓
🇩🇪Germany✓
🇮🇳India✓
🇮🇹Italy✓
🇯🇵Japan✓
🇲🇾Malaysia✓
🇳🇱Netherlands✓
🇵🇭Philippines✓
🇵🇱Poland✓
🇸🇬Singapore✓
🇰🇷South Korea✓
🇪🇸Spain✓
🇸🇪Sweden✓
🇹🇷Turkey✓
🇬🇧United Kingdom✓
🇺🇸United States✓
Click to select or deselect. Multiple countries can be active at once.
A quick reference list of official public and bank holidays for the United States and United Kingdom this year. This table updates automatically every January — use it alongside the calculator above when planning around bank holidays.
🇺🇸 United States
Date
Day
Holiday
🇬🇧 United Kingdom
Date
Day
Holiday
Frequently Asked Questions
Select your start date, enter the number of days, choose Working Days from the unit dropdown, and hit Calculate. The calculator skips weekends and — if you select a country — public holidays too.
Yes. Click Add another period to stack as many combinations as you need. Each row has its own amount and unit, and they're all applied in sequence to the start date.
The start date is automatically set to today when you open the calculator. Just enter 90, select Days, and click Calculate. The result shows the exact date, day of the week, and any public holidays that fall on it.
Toggle the direction to Back before calculating. This subtracts your chosen period from the start date instead of adding to it — useful for finding deadlines, notice periods, or statute of limitations dates.
21 countries are supported: Australia, Brazil, Canada, China, Finland, France, Germany, India, Italy, Japan, Malaysia, Netherlands, Philippines, Poland, Singapore, South Korea, Spain, Sweden, Turkey, United Kingdom, and United States. Select one or more countries in the Holiday Countries panel. Holidays are calculated dynamically for any year, including Easter-based and lunisolar dates.
When enabled, the calculator skips over any public holidays in your selected countries when counting days — just like it skips weekends. This ensures your result only lands on a genuine working day. The result card shows a notice if the date falls on a holiday.
Switch to the Time Zone Converter tab. The origin date and time are pre-filled with your current local time. Select a "From" and "To" timezone, then click Convert. The result shows both times side by side with the offset difference. Daylight saving time is handled automatically for any date you enter.
After calculating any result, the result card shows a working days count between your start date and result date, excluding weekends and any public holidays for your selected countries.
Yes, completely free with no account required. All calculations happen in your browser — no data is sent to any server.
Yes. The calculator is fully responsive and works on all screen sizes. On mobile, tap any country to select or deselect it, and use the native date and time pickers for quick input.