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Timezone Converter

Compare times across multiple zones — live and interactive

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Guides & Resources

How India Standard Time (IST) works

India follows one national timezone: IST (UTC+5:30). Unlike many countries, India does not switch for daylight saving time. This means the local clock stays consistent throughout the year for all cities, including Delhi, Mumbai, Bengaluru, Chennai, Kolkata, and Hyderabad.

Best way to convert IST for meetings

Use the converter when planning calls with the US, UK, Europe, or Australia. A practical workflow is: choose your date first, slide to your preferred hour in IST, then check whether other locations fall inside normal business hours. This avoids confusion during DST transitions in other countries.

Unix, ISO 8601, and RFC 2822 explained

Developers often need timestamps in multiple formats. Unix time is seconds since January 1, 1970 UTC. ISO 8601 is machine-friendly and sortable. RFC 2822 is common in email headers and HTTP-related tooling. Time24 shows all three live so they can be copied directly.

Sunrise and sunset calculations

Sunrise and sunset depend on latitude, longitude, and day of year. The displayed values can shift even between nearby cities. If location access is enabled, Time24 calculates local daylight duration and moon phase for your specific area instead of showing generic national estimates.