Dates & Time

Tools for working with dates, time zones and timestamps. Calculate the difference between two dates in calendar days, business days (accounting for weekends and public holidays), years, months and days — useful for contracts, legal deadlines, pregnancy, age and any chronological calculation. Add or subtract days, weeks, months or years from a base date with instant result. Convert date and time between IANA time zones worldwide, with automatic daylight saving support — essential for international meetings, travel and distributed remote teams. Convert Unix timestamps (in seconds or milliseconds) to a human-readable date and vice-versa, with configurable time zone — crucial for debugging logs, APIs and databases. Calculate business days between two dates accounting for Brazilian, American or European holidays. All tools run 100% in the browser, no signup, no servers. Real-time results as you type. Useful for developers dealing with time zones, project managers, lawyers, HR and anyone who needs precise date math.