Useful first. Curious always.

What works now

Convert a date and time between named time zones, with destinations you can add or remove. The converter accounts for daylight-saving changes: it explains times skipped when clocks move forward and lets you choose which occurrence you mean when a time repeats. You can also count days between dates, add or subtract calendar time, compare date formats used in different countries, and convert Unix timestamps. Linked clocks and the 24-hour comparison help you see the same moment around the world. The Mars calculator compares your age in Earth and Mars years. Light, dark and system themes are available.

More to use and explore

Age milestones, shareable countdowns, business days and local date-planning tools are now available. Clock Playground offers hands-on reading practice. Explore includes Light Lab, a sourced Time Machine, Calendar Explorer and Relativity Lab. The date-and-time converter remains first on the home page.

Private by design

Calculations happen in your browser. Countdown sharing and fiscal CSV downloads happen only when you choose them. No account, advertising or tracking script is required.

Copyright & use

© 2026 Time Playground. All rights reserved.

Our original website code, artwork, written content and visual materials are reserved to Time Playground to the extent protected by applicable law. Except as permitted by law or an applicable license, copying, republishing or redistributing those materials requires prior permission.

You are welcome to use the calculators for learning, everyday tasks and work, and to use and share your calculation results. This notice does not claim ownership of your inputs, mathematical formulas, facts, public-domain data, or third-party material.

Open-source components and third-party data retain their respective licenses and attribution requirements. See the third-party notices. Names of spacecraft, organizations and fictional worlds belong to their respective owners; references do not imply endorsement.

Accuracy & liability

Time Playground is provided for general information, education and convenience. The tools and results are supplied “as is” and “as available,” without warranties as to accuracy, completeness, reliability or suitability for a particular purpose, to the extent permitted by law.

Calculations can be affected by incorrect inputs, browser time-zone data, changing rules and the assumptions explained in each tool. Independently verify important dates, times and deadlines with an authoritative source before relying on a result.

To the fullest extent permitted by applicable law, Time Playground and its operators accept no responsibility or liability for errors, omissions, incorrect calculations, or loss or damage arising from use of, or reliance on, this website or its results. Nothing in this notice excludes or limits liability or rights that cannot lawfully be excluded or limited.