Date & Time
Calculators
Everything you need to work with dates and time. Fast, accurate, and completely free.
Days Between Dates
Calculate the exact number of days, weeks, and months between any two dates.
Days Until
How many days until Christmas, New Year, your birthday, or any custom date.
Age Calculator
Find your exact age in years, months, days, hours, and minutes.
Time Zone Converter
Convert times between any two time zones instantly.
Add / Subtract Days
Add or subtract any number of days, weeks, or months from a date.
Working Days Calculator
Count business days between two dates, excluding weekends.
Week Number
What week number is today? Or find the week number for any date.
Hours Between Times
Calculate hours and minutes between two times of day.
Leap Year Checker
Is any year a leap year? Check instantly with full explanation.
What Day Was It?
Find out what day of the week any historical or future date falls on.
Unix Timestamp
Convert between Unix timestamps and human-readable dates.
Countdown Timer
Live countdown to any future date and time with days, hours, minutes, seconds.
Frequently Asked Questions
How many days until Christmas 2025?
Use our Days Until calculator and select Christmas from the quick-pick events, or enter December 25, 2025 as your target date.
How do I calculate my exact age?
Enter your birth date in our Age Calculator. It gives your age in years, months, days, hours, and even minutes.
How many business days between two dates?
The Working Days Calculator counts only Monday–Friday, excluding weekends. US holidays exclusion coming soon.
What is a Unix timestamp?
A Unix timestamp is the number of seconds since January 1, 1970 (UTC). Use our Unix Timestamp converter to translate between formats.