Date & Time

Convert Unix timestamps to human-readable dates and vice versa online. Free timestamp converter with timezone support and formatting.

Calculate date differences and add or subtract days, months, and years online. Free date calculator with weekday and holiday support.

Calculate the exact difference between two dates in days, weeks, months, and years online. Free date difference calculator tool.

Calculate your exact age from birthdate in years, months, and days online. Free age calculator with upcoming birthday countdown.

Set a countdown to any specific date and time online. Free countdown timer with days, hours, minutes, and seconds display.

Use a simple stopwatch online with lap times and split tracking. Free online stopwatch with start, stop, reset, and lap recording.

View current time in different timezones around the world online. Free world clock with multiple city comparison and UTC offsets.

Stay focused with the Pomodoro technique timer online. Free productivity timer with customizable work and break intervals and alerts.

Find the ISO week number for any date and list all dates in a given week. Free week number lookup with calendar year overview.

Find what day of the year any date falls on (1-365) and convert day numbers back to dates. Free day-of-year calculator with remaining days count.

Calculate your baby's exact age in years, months, weeks, and days from their birth date. Free baby age tracker with milestone timeline.

Count down the days, hours, minutes, and seconds until your wedding day. Free wedding countdown with shareable display and planning milestones.

Add and subtract multiple time durations in hours, minutes, and seconds. Free time calculator for timesheets, video editing, and project tracking.

Estimate jet lag recovery time and get personalized tips based on time zone difference, direction of travel, and departure time.

Convert dates between ISO 8601, US, EU, Unix timestamp, RFC 2822, and custom formats. Free date format converter with live preview.

Generate recurring dates — daily, weekly, biweekly, monthly, or custom intervals. Export to CSV or copy for calendar planning.

Calculate the moon phase for any date with visual representation. See full moon, new moon, and lunar cycle data. Free moon phase tool.