Date & time
Ages, deadlines, countdowns and timesheets. Every calendar question, answered.
Dates
Age calculator
Exact age, and days to the next birthday.
Dates
Days between dates calculator
Count the days between any two dates.
Dates
Date calculator
Add or subtract time from any date.
Dates
Working days calculator
Count working days between two dates.
Dates
What week number is it?
Find the ISO week number for any date.
Dates
Day of the week finder
Find the weekday for any date.
Dates
Countdown to a date
Live countdown to any date and time.
Dates
Hours calculator
Hours between two times, minus breaks.
Dates
Time calculator
Add or subtract hours and minutes.
Dates
Pregnancy due date calculator
Due date from your last period, plus weeks.
Dates
Sleep cycle calculator
Bedtimes and wake times in 90-minute cycles.
Dates
Star sign calculator
Find the zodiac sign for any birthday.
Dates
Minutes to hours converter
Minutes to h:mm and decimal hours.
Dates
Time zone converter
Convert times between world zones.
Dates
Pomodoro timer
25/5/15 focus timer with session dots.
Dates
Stopwatch
Laps with split and total, to the hundredth.
Dates
Days until Christmas
Live sleeps countdown to 25 December.
Dates
Moon phase calculator
Moon phase and illumination for any date.
Dates
Leap year checker
Yes or no, with the 4/100/400 rule shown.
Dates
Dog age calculator
Dog years to human years, by size.
Dates
Cat age calculator
Cat years to human years, the 15/24/+4 chart.