Online Datetime Tools

Calculate the exact duration between two dates in days, weeks, months, and years.

Calculate a date by adding or subtracting business days, excluding weekends and holidays.

Add or subtract time units like hours and minutes from a specific time.

Calculate exact age in years, months, days, and seconds from a birthdate.

Calculate total hours worked from start and end times, including breaks.

Convert between Unix Epoch time and human-readable dates.

Visually build cron schedule expressions without memorizing syntax.

Convert dates to and from standard ISO 8601 format.

Calculate the end time of a task based on start time and duration.

User enters their birthday, and it tells them the day of the week (e.g., Tuesday).

Creates a link or embed code for a countdown to a specific event (New Year, Product Launch).

Determines the astrological sign based on the birth date.

Generates a printable PDF calendar for any specific year or month.

Displays the current ISO week number of the year or finds the week number for a specific date.

Shows which number day (1-365) a specific date falls on.

Simple tool to check if a specific year is a leap year and explains why.

Calculate your age using the traditional Korean age system.

Convert your dog's age to human years using accurate calculations.

Convert your cat's age to human years using accurate calculations.

Calculate the age gap between two people with detailed insights.