Date & Time Formats Tools
Date and time format reference and tools: Unix timestamps, ISO 8601, RFC 3339, UTC and local time compared, covering second and millisecond precision, timezone.
日期时间格式对照表 (Date & Time Formats) is a frequently consulted reference for developers. Keeping the reference and ready-to-use tools on one page cuts the cost of switching back and forth. All tools below run locally, are free, and need no sign-up.
Related Tools
- ⏱️Unix Timestamp ConverterConvert between Unix timestamps and human-readable dates with ISO 8601 output. Essential for log analysis, API debugging and cross-timezone scheduling work.
- 🌍Timezone ConverterConvert any moment between world time zones with a live clock for UTC, Shanghai, Tokyo, London and more. Schedule across regions and time zones with confidence.
- 📅Date CalculatorAdd or subtract days, diff dates and format dates with time zone support, optionally skipping weekends and holidays for scheduling and deadlines. Skip weekends.
- ⏱️Chronometer / StopwatchStopwatch with start, pause, lap and reset at millisecond precision for timing tasks, workouts and code execution, with records that survive tab reloads.
- ⏳ETA CalculatorCompute estimated time of arrival from rate and remaining work with custom units for sprint planning and long-running batch task progress projections.
- 📅Lunar Calendar ConverterConvert between Gregorian and Chinese lunar dates, with zodiac, Gan-Zhi, solar terms and leap month support. Check traditional festivals birthdays with zodiac.