How to use the Time Zone Reference
- Search. Start typing in the search box — results filter instantly.
- Browse the table. Scroll through the complete reference table.
- Copy. Click any cell to copy its value to your clipboard.
About this tool
Age, date difference, countdown, time zone, working days and calendar tools.
Read the complete Time Zone Reference guide
Frequently asked questions
Is the Time Zone Reference free to use?
Yes. The Time Zone Reference on Gemma-4 is 100% free with no sign-up, no limits and no watermark. An optional free account lets you save favourites.
Is my data private?
Yes. Your inputs are processed instantly and are not stored on our servers.
Does it work on mobile phones?
Absolutely. The Time Zone Reference is fully responsive and works on Android, iPhone, tablets and desktop browsers such as Chrome, Edge, Safari and Firefox.
Who is the Time Zone Reference useful for?
It is popular with HR teams counting working days, students planning exam schedules, event planners — anyone who needs quick, reliable help with date and time calculations.