Contact us
Questions, corrections, and suggestions are all welcome.
DateSpan is maintained by a small team that cares about getting date math right. If a calculation looks off, telling us is genuinely useful — include the exact dates you entered and what you expected, and we will check it against our test suite.
Reach us at contact@keephand.com. We read every message and aim to reply within a few business days.
What to include
- Reporting a wrong result? Tell us the tool, the exact dates or numbers you entered, the result you got, and the result you expected.
- Suggesting a tool? Describe what you would calculate and how you would use it.
- General question? Ask away — if it is a common one, we may add it to a tool's FAQ.
A note on privacy
We do not collect the dates you type into our calculators — everything runs in your browser and nothing is sent to us. When you email, we only see what you choose to write. Please do not include sensitive personal or client information in a message; a description of the dates involved is enough for us to reproduce a calculation.