Numbers and money
Dates & Time
23 free tools for dates, times and deadlines: how many days lie between two dates and how many are business days, add days to a date, work out an age, find the day of the week, timer, stopwatch and Pomodoro, the time around the world, daylight saving changes, moon phases, sunrise and sunset, Unix timestamps.
Most popular
Timer
Countdown timer with quick presets and an alarm sound when time is up.
Current time
Live clock with seconds, full date, ISO week number and day of the year.
Monthly Calendar
Any month's calendar with US federal holidays highlighted, ready to print.
Date Difference
Days, weeks, months and years between two dates, with business days only.
Business days
Count business days between two dates, skipping weekends and US federal holidays.
Add Days to a Date
Add or subtract days, weeks or months from a date, with a skip-weekends option.
All tools, A to Z 23
Add Days to a Date
Add or subtract days, weeks or months from a date, with a skip-weekends option.
Age Calculator
Exact age in years, months and days, days lived, and next-birthday countdown.
Business days
Count business days between two dates, skipping weekends and US federal holidays.
Cat age in human years
How old is your cat in human years? Veterinary chart with life stage.
Current time
Live clock with seconds, full date, ISO week number and day of the year.
Date Difference
Days, weeks, months and years between two dates, with business days only.
Day of the week
Find what day of the week any date fell on: birthdays, anniversaries, history.
Daylight saving time
When the clocks change, with countdown
Dog Age in Human Years
Convert your dog's age to human years, with a size-based formula and chart.
Duration converter (hh:mm:ss)
Convert hh:mm:ss to total seconds, minutes or hours and back, in real time.
Event countdown
Live countdown to any event, saved in your browser so it's there when you return.
Leap year checker
Check if any year is a leap year, with the rule explained and the next 10 listed.
Monthly Calendar
Any month's calendar with US federal holidays highlighted, ready to print.
Moon phases
Today's moon, full moon and lunar calendar
Pomodoro Timer
Pomodoro technique: 25-minute focus blocks, automatic breaks and cycle counter.
Season start dates
Equinoxes and solstices of any year, to the minute
Stopwatch
Online stopwatch with lap times, works accurately even in background tabs.
Sunrise and sunset
What time the sun rises and sets
Timer
Countdown timer with quick presets and an alarm sound when time is up.
Unix Timestamp
Live epoch time plus converter: timestamp to date and back, seconds or ms.
Wedding anniversaries
Silver, golden… which one are you celebrating?
Week number
Today's ISO 8601 week number, or for any date, with weeks left in the year.
World clock
What time it is now in cities around the world