Calculate the days.Plan what comes next.
Compare dates, find your next working-day deadline or count down to a day that matters.
What would you like to work out?
114 focused tools, grouped by the answer you need.
Date Calculator
Move forward or backward by calendar days, weeks, months or years. Month-end dates clamp to the last valid day.
Business Days Calculator
Count working days using your weekend pattern and optional excluded dates. Public holidays are excluded only when entered.
Countdown Calculator
Choose a target date and time for a live countdown. Birthday and anniversary modes can repeat every year.
Time Zone Converter
Convert an exact UTC instant to another IANA time zone.
Date Range Overlap Calculator
Compare two date ranges and see their shared dates, overlap length and endpoint convention.
Recurring Date Generator
Build a daily, weekly, monthly or yearly schedule directly from its original date anchor.
Work Hours & Breaks Calculator
Calculate a dated shift’s elapsed hours and deduct a chosen break duration.
Year Progress Calculator
See the share of a calendar year completed before a selected date, with day totals and remaining dates.
What’s coming up?
Remaining days, exact dates and the rule behind each recurring event.
World Teachers’ Day
World Mental Health Day
The Weekend
Halloween
Friday the 13th
Thanksgiving (US)
Winter
A date from today
Calculated from Monday, October 5, 2026. The reference moves forward each day.
Get the dates right, step by step
Start with a counting rule, then follow a worked example.
Days, complete weeks and calendar months answer different questions.
02 · PLAN A DEADLINEWorking days and holidaysChoose weekends, endpoint rules and the correct holiday scope.
03 · COUNT DOWNDates, instants and time zonesKeep the target time and the event’s location together.
Unix Timestamps vs Calendar Dates: Units, UTC and Conversion
Convert seconds and milliseconds without mixing up their units. Understand the Unix epoch, negative timestamps, UTC instants and date-only inputs.
Convert ISO Week Dates and Ordinal Days to Calendar Dates
Convert week-year/week/weekday values and year/day-number values correctly. Examples cover week 53, New Year boundaries, leap days and invalid inputs.
Work Hours, Breaks and Overnight Shifts: Calculate Elapsed Time
Calculate a dated shift, deduct the break you enter and interpret decimal hours. Includes overnight examples, input validation and daylight-saving limitations.
Add and Subtract Durations: Hours, Minutes, Seconds and Decimal Totals
Add or subtract elapsed amounts without treating minutes as decimals or wrapping at midnight. Includes carries, borrowing, negative totals and conversion checks.
Weekend Patterns and Working Calendars: Count the Right Dates
Separate weekday labels from working-day eligibility. Compare weekend patterns, holiday scope, custom closures and inclusive endpoints with a reproducible example.
PST to EST: Dates, Daylight Saving and Meeting Times
Convert Pacific and Eastern times with the right source date, distinguish fixed offsets from local zones, and resolve skipped or repeated hours before sharing a meeting.
Explore 2026 and beyond
Generate a year calendar or load the holiday records published for your country.
Gregorian calculations generate the selected year directly. Holiday and broadcast schedules follow their providers’ published coverage.
Keep exploring
View the tool libraryDays Between Dates
Compare two dates with calendar days, complete weeks and weekday counts. Choose whether to include the end date.
Business Days Calculator
Count working days using your weekend pattern and optional excluded dates. Public holidays are excluded only when entered.
Day of the Week
Inspect a Gregorian date, leap-year rules, ISO week numbers and a printable month calendar.
Time Zone Converter
Convert an exact UTC instant to another IANA time zone.
