Count and compare dates
Find the gap between two dates, add days to a date, or count down to one.
Calendar lookups
Look up how a date sits in the calendar or when clocks change.
Days from today
The date a set number of days ahead, with the weekday.
Weeks and months from today
The same idea for periods counted in weeks or months.
Choose by the question you are asking. If you know both dates, days between dates gives the gap. If you know one date and a length of time, the date calculator adds or subtracts it. If you only want the days remaining to a future event, use days until or the birthday countdown. The age calculator works out an age in years, months and days from a birth date.
The from-today pages are shortcuts for the periods people look up most, such as 30 days, 90 days or 6 weeks, and each one starts from today's date on your device. Use the calendar lookups when you need a week number for planning, a day of the year, a Julian date, or the dates daylight saving starts and ends. Month-end and leap-year cases are handled by the same date rules your browser uses.