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Instantly convert between human-readable dates and UNIX timestamps (seconds/milliseconds). Perfect for development, debugging, and data processing.
Expiration Date Calculator
Calculate the expiration date based on the production date and shelf life, or check the near-expiry and expired status based on the expiration date.
Baby 100 Days Calculator
Calculate the exact Gregorian and Lunar dates, along with the day of the week, for your baby's 1-month, 100-day, and 1-year milestones based on their birth date.
Lunar and Solar Calendar Converter
A tool for converting dates between the lunar and solar calendars. It supports lunar leap months and is ideal for looking up holidays, birthdays, or historical dates.
Age Calculator
Enter your birth date to instantly calculate your exact age, traditional Chinese age, and total days alive, plus find your Chinese zodiac, horoscope, and lunar birthday.
Expiration Date Calculator
Calculate the expiration date based on the production date and shelf life, or check the near-expiry and expired status based on the expiration date.
Baby 100 Days Calculator
Calculate the exact Gregorian and Lunar dates, along with the day of the week, for your baby's 1-month, 100-day, and 1-year milestones based on their birth date.
Lunar and Solar Calendar Converter
A tool for converting dates between the lunar and solar calendars. It supports lunar leap months and is ideal for looking up holidays, birthdays, or historical dates.
Age Calculator
Enter your birth date to instantly calculate your exact age, traditional Chinese age, and total days alive, plus find your Chinese zodiac, horoscope, and lunar birthday.
Bazi to Gregorian Calendar Converter
A two-way Bazi and Gregorian calendar converter with Late Rat Hour (Zi Shi) rule options, designed for Chinese astrology and calendar calculations.
Do you feel confused when facing a long string of timestamp numbers while processing time in program logs, API interfaces, or databases? The core function of this tool is to provide real-time, two-way conversion between human-readable dates and times and UNIX timestamps. A UNIX timestamp, also known as Epoch time, is a well-defined unit of computer time representation. It refers to the number of seconds or milliseconds that have elapsed since Coordinated Universal Time (UTC) 00:00:00 on January 1, 1970 (ignoring leap seconds). This tool processes this core unit, instantly outputting the corresponding format whether you input a date or a timestamp.
Q: What time does the timestamp 1698373800 correspond to in Beijing Time?
A: October 27, 2023, at 10:30:00 (UTC+8). This is a typical "short answer" question that directly addresses a common search intent.
Q: How does the tool handle timezones? Which timezone is my input time considered to be in?
A: This tool defaults to using your operating system's local timezone for all calculations. The "Date" you enter is treated as local time, and the tool will first convert it to UTC before calculating the timestamp. Conversely, after entering a timestamp, the converted "Date" is also displayed in your local time. This means that the same timestamp will display as different local times on the user interfaces of users in different timezones, which is the correct behavior.
Please pay attention to the input formats: "Date" must be in "YYYY-MM-DD HH:mm:ss" format, and "Timestamp" must be a pure integer. The date input box is typically only precise to the second, so when generating a millisecond-level timestamp from a date, the millisecond portion defaults to 000. The representation range of timestamps is limited by computer integer representation; times that are too far in the past or future (before 1970 or after 2038) may not convert accurately. All calculations for this tool are performed locally in your browser, and no data is uploaded to our servers, so you can use it with peace of mind.
For developers, standardizing on UNIX timestamps (especially UTC second-level timestamps) when handling cross-system time data is a best practice to avoid timezone confusion. This tool is perfect for quick validation and debugging. For example, when analyzing JSON data returned by an API, if you encounter "created_at": 1698373800, you can immediately enter it into this tool to get a readable date. Conversely, when you need to write "2023-10-27 10:30:00" to a database, you can use this tool to quickly obtain the timestamp value 1698373800. Remember, a second-level timestamp is a 10-digit number, and a millisecond-level timestamp is 13 digits. This is a practical trick for quickly determining timestamp precision.
