Countries & FlagsCountry & World ReferenceExplore world reference data and parse/validate phone numbers with E.164, NSN, examples, as-you-type formatting, CSV import and batch normalization.On-device
Date & Calendar ToolsDate CalculatorCalculate age, date differences, week/day numbers, date arithmetic, and business-day counts.On-device
Date & Calendar ToolsDate Formats by Country & LanguageSee how the same date is written in the official and local languages of countries and territories worldwide.On-device
Time & Time ZonesTime Zone ToolkitConvert time zones and build/import/preview RFC 5545 RRULE/iCalendar schedules with TZID, DTEND/duration, RDATE/EXDATE, attendees, alarms and multi-event export.On-device
Date & Calendar ToolsWorld Calendar ToolkitConvert dates across implemented world calendars and inspect today's date across those calendars.On-device
Time & Time ZonesUnix Timestamp ↔ DateConvert Unix seconds to date/time and convert local date/time back to a Unix timestamp.On-device