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Date & Time Tools
Free date and time tools — calculate ages and date differences, convert time zones and timestamps, count down to events, find week numbers and business days, and generate calendars.
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Age Calculator
Calculate your exact age in years, months and days from your birth date.
ΔDate Difference
Find the exact time between two dates in days, weeks, months and years.
+dDate Add / Subtract
Add or subtract days, weeks, months or years from a date.
⏳Countdown Timer
Live countdown showing the days, hours, minutes and seconds until a target.
🌐Time Zone Converter
Convert a date and time from one time zone to another.
wkWeek Number
Find the ISO week number, day of year and quarter for any date.
📅Business Days Calculator
Count the working days between two dates, optionally excluding weekends.
ΣtTime Duration Calculator
Add or subtract two HH:MM:SS durations and see the normalized result.
🕐World Clock
See the current local time across major cities and time zones at a glance.
Y-mDate Format Converter
Format a date and time as ISO 8601, RFC 2822, US, EU, Unix and localized strings.
📆Day of the Week
Find which weekday a date falls on, plus day of year, week number and weekend status.
⏲$Work Hours Calculator
Calculate hours worked from clock-in and clock-out, minus breaks, with optional pay.
😴Sleep Calculator
Find ideal bedtimes or wake-up times based on 90-minute sleep cycles.
♈Zodiac Sign Finder
Find the western zodiac sign and Chinese zodiac animal for any birth date.
🍅Pomodoro Timer
A focus timer that cycles between work and break periods and counts your sessions.
⏱Stopwatch
A precise stopwatch with lap times, accurate to hundredths of a second.
🗓Calendar Generator
Display a localized month calendar for any month and year, with today highlighted.
📅Leap Year Checker
Check whether a year is a leap year and see the next few leap years.
31Days in Month
Find how many days are in any month, plus the weekdays it starts and ends on.
msMilliseconds Converter
Convert milliseconds to a days, hours, minutes, seconds breakdown and back.
3rdNth Weekday Finder
Find dates like the 3rd Monday or the last Friday of a given month.
⏳Life Statistics
See your age in many units plus estimated heartbeats, breaths and a birthday countdown.