Tools

Small tools, same engine

Everything here runs on the corpus the API serves. They are free and need no account, and each one shows its working — which day it excluded, what that day was called, and how well we can stand behind it.

Working days between two dates Weekends and that country's public holidays taken out, with every excluded day named. Deadline in working days Ten working days from Tuesday — in whose working days? Pick the country and see each day the count stepped over. Working days by month Every month of a year at once, with the closures that shortened each one named. The question a headcount or a payroll calendar starts from. Long weekends Every run of consecutive days off in a year — and the ones you only get by taking a single day of leave to bridge a gap. Operating Calendar Two places at once: when are they both open, and do their office hours overlap at all?

Not built yet

Listed because they are next, not because they are nearly done. Nothing below is clickable and nothing below has a date.

Calendar converter Gregorian against Hijri, Hebrew, Solar Hijri, Chinese lunisolar and Julian — with the rule shown, not just the answer.

Meeting planner More than two places, real office hours, and a ranked list of times that clear every calendar and every clock.

What these tools will not do. They answer about one country at a time, at national level, using statutory closures. The comparison across many places, the subdivisions, the religious and observed-but-open layers and the evidence behind each date are the product — they are in the API and the dossiers. Nothing here is a crippled version of those; it is a genuinely useful answer over a deliberately small slice.