Free Date & Time Online
22 free tools — no signup required
Calculate the difference between dates, convert between timezones, count business days, find what day of the week a date falls on, and create countdowns to important events. Precise date arithmetic for planning and scheduling.
Date Difference Calculator
Calculate the exact number of days, weeks, months, and years between two dates.
Add/Subtract Days Calculator
Add or subtract days, weeks, months, or years from any date.
Week Number Calculator
Find the ISO week number for any date and see the full week calendar.
Business Days Calculator
Calculate the number of business days (excluding weekends) between dates.
Time Duration Calculator
Calculate duration between two times and add/subtract time intervals.
Calendar Generator
Generate printable monthly and yearly calendars.
Age in Days Calculator
Find out exactly how many days, hours, and minutes old you are.
Leap Year Checker
Check if any year is a leap year and see the next leap years.
Holiday Calculator
Find public holidays and count working days for any country and year.
Date Range Generator
Generate a list of all dates between two specified dates.
Workday Calculator
Find the date that falls exactly N business days from a given date.
Moon Phase Calculator
Calculate the moon phase for any date — new, full, crescent, and more.
Sunrise & Sunset Calculator
Calculate sunrise and sunset times for any location and date.
Day of the Week Finder
Find what day of the week any date falls on — past or future.
Fiscal Year Calculator
Calculate fiscal year quarters, start/end dates, and current period.