Time & Date Tools
Every date and time tool on this site, grouped by what they do. All run instantly in your browser — no sign-up, no data collection, no server round-trips. Below you'll also find a "which tool do I need?" picker and a short FAQ.
Date Tools
For counting, adding, subtracting and browsing dates — days, weeks, months, calendar ranges. Use these when you care about a calendar day, not a clock time.
Age Calculator
Find your exact age live to the second, the day you were born, and your milestone dates.
Days Calculator
Calculate days between dates or find future/past dates.
Day of the Week
Find the weekday for any past or future date, and see how it's worked out.
Weeks Calculator
Calculate weeks between dates or find dates by weeks.
Business Days Calculator
Count working days between dates excluding weekends.
Event Countdowns
Live countdowns to Christmas, Easter, summer, holidays, and more.
Calendar
Interactive monthly calendar tool.
Julian Date
Find today's Julian date, convert formats, and browse year tables.
Next Leap Year
Find when the next leap year occurs.
Weeks in Year
Calculate how many weeks are in any year.
Time Tools
For working with clock times — hours, minutes, seconds, time zones, Unix timestamps. Use these when you care about an exact moment within a day.
Time Calculator
Calculate time until a specific time of day.
Time Zone Converter
Convert times between world time zones with DST.
Unix Timestamp Converter
Convert between Unix timestamps and dates.
Minutes Ago Calculator
Find what time it was X minutes ago.
Which Tool Do I Need?
Starting from what you're trying to do, not what the tool is called. If none of these fits, the homepage has a today-at-a-glance dashboard covering the most common lookups.
I need to know the date N days, weeks, or months from today
Use Days Calculator for exact calendar days, Weeks Calculator for whole-week increments (same weekday), or jump straight to a common number from the Days Calculator quick-links grid.
I need to count only working days (no weekends)
Use Business Days Calculator. It excludes Saturday and Sunday. Note that public holidays are not excluded — they vary too much by country.
I need to know the time in another country right now
Use Time Zone Converter. The page includes a live world-cities reference grid and DST transition dates so you can spot offset changes without running a conversion.
I need to count down to a specific time of day
Use the Time Calculator: pick any hour and minute for a live countdown, or use its quick links to jump straight to a ready-made countdown for a common time such as noon, 4 PM, or midnight.
I need a Unix timestamp, or to convert one to a date
Use Unix Timestamp Converter. Shows the current live timestamp, converts both directions, and includes copy-paste snippets for JavaScript, Python and PHP.
I need to know what time it was X minutes ago
Use Minutes Ago Calculator. Common for reconstructing call timelines, workout timing, and photo timestamp checks.
I need to know what day of the week a date falls on
Use Day of the Week. Works for any past or future date — the day you were born, a historical event, an upcoming deadline — and shows the same date across nearby years so you can spot when it next lands on a weekend.
I want to browse a month visually
Use Interactive Calendar. Click any date for day-of-year, ISO week number, quarter and leap-year status.
I need to know when the next leap year is
Use Next Leap Year. Includes the next 20 upcoming leap years, a history of recent ones, and the tricky century-year rule table.
Frequently Asked Questions
Yes. Every tool on this site is free to use, requires no account, and places no limits on how often you can run a calculation. Site costs are covered by a small number of Google AdSense ad placements.
No. Every tool runs entirely in your browser using JavaScript — the dates, times, and numbers you enter never leave your device. See our Privacy guideline for details on the privacy-preserving analytics we use for aggregated page-view counts.
The Time Zone Converter applies the correct DST rules for the date you enter, using the IANA time zone database via the browser's Intl API. Other tools use your device's local clock, which already reflects DST for your region.
Open the Time Calculator and use the "Popular Time Countdowns" quick links — noon, 4 PM, 9:30 AM, midnight, and other frequently needed times each have a ready-made live countdown. For unusual times like 4:37 PM, just type the hour and minute into the form.
The site reads the IANA time zone your operating system reports via the browser. If it's wrong, fix it in your OS settings and refresh. On the Time Zone Converter you can manually pick any of the ~400 IANA zones regardless of auto-detection.
Partially. Once a tool page has loaded, its calculations run in your browser, so a dropped connection won't interrupt them (time-zone accuracy still depends on your device clock). Opening a new page does require a connection: the service worker caches static assets like scripts and icons for speed, but deliberately never caches the pages themselves, so date-dependent answers are always fresh.
Missing a tool?
If there's a specific calculation or converter you wish this site had, let us know through the contact page. Every tool here started as a real user request.