About
A calculator for dates and times.
numcal is a project. Not a company, not a startup, not a brand. I make a date and time calculator, and I believe that is a perfectly respectable thing to make.
I started numcal in 2024 on a small thesis: that the math of days, weeks, months, time zones, calendars, and holidays is more consequential than it looks. A botched contract date. A missed filing. A standing meeting that arrives at four in the morning, local. The cost of date errors is usually small and always avoidable, and over a long enough horizon they compound into something serious. This is the work I am in.
What I believe
- Always works. The tool never refuses a reasonable question. When a query can't be understood, you get a useful suggestion, not an error. If you can ask it, it tries.
- Show the work. Every answer lists the assumptions that produced it: calendar system, language and region, working week, daylight saving handling, and which country's holidays were applied. Date math depends on context, and the context is always visible.
- One input box, no forms. You type the question and the answer appears. The suggestion chips below teach the grammar without asking you to fill in fields first.
- No advertising, ever. No banner ads, no tracking pixels, no sponsored suggestions, no affiliate links. Your queries are not collected and not sold. A future paid API will fund the operation; the web tool stays free.
- Built for the whole world from day one. Date formats, working weeks, and holiday calendars for fifteen countries shipped on the first day numcal was reachable. The non-US world is not a future feature.
Who runs it
Axel runs numcal. He works alone, from a single desk, and he thinks date math is more interesting than it has any right to be. He answers his own mail.
For correspondence or to join the API waitlist, see the API page.
Established 2024.