BDK Date Calculator
Date Calculator
Days between dates, working days, date maths and age.
🔒 Your files stay on your device. Processing happens in your browser, and your documents are not uploaded to BusyDayKit servers.
Days between two dates
Add or subtract time
Use a negative number to go back in time.
Age and next birthday
What Date Calculator does
The Date Calculator answers the everyday date questions: how many days between two dates, how many of them are working days, what date is 30 days from now, and how old someone is.
You can choose which weekend days to leave out, for example Saturday and Sunday or Friday and Saturday. Public holidays are not included.
Features
- Days, weeks, and years-months-days between dates
- Working days with a weekend of your choice
- Add or subtract years, months and days
- Age, total days lived and days to next birthday
- Dates handled as calendar days, so daylight saving never shifts a result
How to use Date Calculator
- Pick a tab.
- Choose your dates.
- Read the results.
Frequently asked questions
Does it count public holidays?
No. Working days leave out the weekend you choose but not public holidays.
Is the first day counted?
Not by default. Tick “Count both the first and the last day” to include both.
What happens when I add a month to the 31st?
The date moves to the last day of the shorter month, as spreadsheets do.
Privacy: your files stay with you
Your files stay on your device. Processing happens in your browser, and your documents are not uploaded to BusyDayKit servers.
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