Date & Time
36 tools available
Calculate date differences, convert time zones, generate calendars, and more.
Date Difference Calculator
Calculate the exact number of days, months, and years between any two dates.
Add or Subtract Days
Add or subtract days, weeks, months, or years from any date.
Business Days Calculator
Calculate the number of business (working) days between two dates, excluding weekends.
Age Calculator
Calculate your exact age in years, months, days, and more from your birthdate.
Countdown Timer
Create a live countdown to any future date and time with days, hours, minutes, and seconds.
Stopwatch
Online stopwatch with lap times, start/stop, and reset functionality.
Pomodoro Timer
Pomodoro technique timer with customizable work/break intervals and session tracking.
World Clock
View the current time in multiple cities and timezones around the world simultaneously.
Timezone Converter
Convert any date and time between multiple timezones instantly.
Unix Timestamp Converter
Convert between Unix timestamps and human-readable dates in both directions.
ISO 8601 Formatter
Format any date/time into ISO 8601 standard format with multiple variants.
Date Format Converter
Convert dates between US, European, ISO, and other popular formats simultaneously.
Calendar Generator
Generate a clean calendar view for any month and year with customizable week start.
Week Number Calculator
Get the ISO week number for any date along with week ranges and quarter info.
Day of Year Calculator
Find what day of the year (1-365) any date falls on, with a visual progress bar.
Leap Year Checker
Check if any year is a leap year and see the mathematical rules explained.
Moon Phase Calculator
Calculate the approximate moon phase for any date with illumination percentage.
Sunrise & Sunset Calculator
Calculate approximate sunrise and sunset times for any location and date.
Holiday Calendar
View major holidays for selected countries and years with date and type classification.
Working Hours Calculator
Calculate total working hours from start/end times minus break duration.
Time Duration Calculator
Calculate the duration between two times with optional date support for multi-day spans.
Meeting Time Finder
Find overlapping working hours across multiple timezones for scheduling meetings.
Epoch Converter
Convert epoch timestamps in seconds or milliseconds to human-readable dates with auto-detection.
Cron Expression Generator
Build cron expressions visually with presets, field editors, and next-run previews.
Cron Expression Parser
Parse and explain cron expressions in plain English with field breakdown and next runs.
Date to Words
Convert any date into written words in multiple formal and informal formats.
Relative Time Calculator
Show how long ago or how far in the future any date/time is, with live updating.
Fiscal Quarter Calculator
Determine the fiscal quarter for any date with configurable fiscal year start month.
Julian Date Converter
Convert between Julian Date numbers and Gregorian calendar dates.
Gestational Age Calculator
Calculate gestational age and estimated due date from the last menstrual period.
Chronological Age Calculator
Calculate precise chronological age with optional birth time for exact age in years, months, days.
Time Card Calculator
Calculate hours and pay from multiple clock-in/out entries with overtime tracking.
Shift Schedule Generator
Generate work shift schedules with configurable on/off patterns and calendar view.
Date Range Generator
Generate a list of dates within a range with configurable step and format options.
Recurring Date Calculator
Calculate dates for recurring events at daily, weekly, monthly, or yearly intervals.
Sleep Calculator
Calculate optimal bedtimes or wake times based on 90-minute sleep cycles.
About Date & Time
Our date & time collection offers a comprehensive suite of browser-based utilities designed to handle everyday tasks without any software installation. Every tool processes your data entirely on your device — nothing is uploaded to a server, keeping your files completely private.
Whether you're a professional needing quick conversions, a student working on assignments, or anyone who values privacy, these 36+ free tools are ready to use instantly. No signup, no downloads, no limits.
Common Use Cases
- ✓Quick file processing without installing software
- ✓Privacy-sensitive work that can't be uploaded to cloud services
- ✓Batch operations on multiple files at once
- ✓Cross-format conversions for compatibility
- ✓On-the-go editing from any device with a browser
Frequently Asked Questions
Are these date & time really free?
Yes, every tool is 100% free with no hidden fees, no premium tiers, and no usage limits.
Is my data safe when using these tools?
Absolutely. All processing happens directly in your browser. Your files are never uploaded to any server.
Do I need to create an account?
No. Every tool works instantly without any signup or registration.
Can I use these tools on mobile?
Yes! All tools are fully responsive and work on phones, tablets, and desktops.
What browsers are supported?
Our tools work on all modern browsers including Chrome, Firefox, Safari, and Edge.