Timestamp converterConvert Unix seconds or milliseconds to local date-time, or turn a local date-time into Unix seconds.
Date calculatorFind the signed number of calendar days between dates, or add and subtract days from a date.
Workday calculatorCount a custom Gregorian work calendar with selected weekly weekends, holiday and make-up dates, endpoint choices, a complete daily list and bounded CSV.
Current Unix timestampShow the current Unix seconds, milliseconds, local time, UTC, and ISO 8601 value from your device clock.
Time zone converterConvert local times in 13 IANA zones with explicit DST choices, then find common weekly working-hour meeting slots and prepare UTC ICS.
China public holidaysLook up China’s built-in 2024–2026 holiday periods and compensatory working days.
Chinese lunar calendarConvert a Gregorian date to Chinese lunar-calendar fields and the associated zodiac animal.
Chinese zodiac lookupFind the Chinese zodiac animal using a full birth date and its lunar-calendar year.
Date range checkerCheck whether a date falls inside an inclusive range and compare elapsed versus inclusive day counts.
Pomodoro timerAlternate focus sessions, short breaks, and scheduled long breaks with a configurable browser timer.
Cron Time Zone and DST SimulatorParse numeric five-field Cron with an IANA zone, explicit start and execution count; inspect skipped and repeated local times.
Cron expression generatorBuild five-field Cron expressions from minute, hourly, daily, weekly, monthly, or custom settings.
Weekday and day-of-yearFind a date’s weekday, Monday-based weekday number, and ordinal day within its year.
Relative timeCompare a local target date-time with the device’s current time using relative wording and an elapsed-time breakdown.
ISO week lookupConvert a calendar date to its ISO week-year, week number, weekday, and Monday-to-Sunday range.
Printable month and week plannerGenerate a Gregorian month grid, week planner or blank weekly timetable with local notes.
ICS calendar generator and inspectorGenerate local iCalendar from a JSON event array, or inspect a supported ICS profile, then preview occurrences, exclusions and overlaps.