Date & Time Tools
Calculate date differences, business days, ages, countdowns, time durations, time zones, and Unix timestamps. This category is grouped around planning, scheduling, personal tracking, and technical time workflows.
Use the grouped sections when you need help choosing between calendar-date tools, workday calculators, time duration tools, and timestamp utilities.
Start with common date and time tools
Date Difference Calculator
Compare two dates and calculate the difference in days, weeks, months, or years.
OpenDays Between Dates
Calculate the number of days between two calendar dates.
OpenBusiness Days Calculator
Calculate business days between dates while excluding weekends.
OpenAge Calculator
Calculate exact age from a birth date in years, months, and days.
OpenTime Zone Converter
Convert times between time zones for meetings, travel, and scheduling.
OpenUnix Timestamp Converter
Convert Unix timestamps to readable dates, or convert dates into Unix time for development and logging.
OpenUnix Time to Date
Convert Unix time values into readable date and time formats.
OpenTime Duration Calculator
Calculate duration between start and end times.
OpenDate and time tools by task
Date differences and workdays
Calculate days between dates, business days, work days, or calendar ranges for planning and scheduling.
Personal dates and countdowns
Use these tools for birthdays, age checks, future events, milestones, and personal date tracking.
Time, zones, and timestamps
Work with exact times, durations, time zones, Unix timestamps, and time-based records.
What these tools are useful for
Planning and scheduling
Measure the time between deadlines, appointments, trips, project dates, billing cycles, and recurring events.
Personal tracking
Age, countdown, and duration tools are useful for birthdays, milestones, goals, waiting periods, and long-term progress checks.
Work and record keeping
Timestamp, weekday, and duration calculations can help with logs, reports, planning windows, and practical date comparisons.
Browse all date and time tools
Search all available tools below if you already know the type of calculation you need.
Days Between Dates
Calculate the number of days between two calendar dates.
OpenAge Calculator
Calculate exact age from a birth date in years, months, and days.
OpenCountdown Timer
Create a simple countdown to a future date and time.
OpenAdd/Subtract Days Calculator
Add or subtract days from a date to calculate future or past calendar dates.
OpenDay of Week Calculator
Find the day of the week for any selected calendar date.
OpenBusiness Days Calculator
Calculate business days between dates while excluding weekends.
OpenWorking Hours Calculator
Calculate working hours between start and end times.
OpenDate Difference Calculator
Compare two dates and calculate the difference in days, weeks, months, or years.
OpenTime Duration Calculator
Calculate duration between start and end times.
OpenWork Days Calculator
Calculate workdays between dates for schedules, deadlines, and planning.
OpenTime Between Times
Find the time difference between two clock times.
OpenBirthday Countdown
Count how many days remain until the next birthday.
OpenHours Between Times
Calculate hours between two times for shifts, logs, and schedules.
OpenWeek Number Calculator
Find the week number for a selected date.
OpenMonths Between Dates Calculator
Calculate the number of months between two dates.
OpenTime Zone Converter
Convert times between time zones for meetings, travel, and scheduling.
OpenUnix Time to Date
Convert Unix time values into readable date and time formats.
OpenTimestamp Now
Get the current timestamp in common date and time formats.
OpenWeeks Between Dates Calculator
Calculate the number of weeks between two calendar dates.
OpenYears Between Dates Calculator
Calculate the number of years between two calendar dates.
OpenAdd Months Calculator
Add or subtract months from a date for planning, billing, and schedule calculations.
OpenLeap Year Calculator
Check whether a year is a leap year and understand the result.
OpenUnix Timestamp Converter
Convert Unix timestamps to readable dates, or convert dates into Unix time for development and logging.
OpenHow to choose the right date or time tool
If you want to know how many days separate two calendar dates, choose a date difference tool. If you need weekday-based planning, choose a business-day or workday tool. If you are working with logs, APIs, or technical records, choose a timestamp tool.
Date and time calculations can depend on weekdays, month lengths, time zones, and context, so focused pages are easier to check than one overloaded calculator.