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Real-time countdown to the exact start of the first day of fall.
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.
SHAKE Hash Generator
Variable-length hash generator for SHAKE-128/256, featuring salt support, multiple iterations, and various input/output formats.
Baby 100 Days Calculator
输入宝宝出生日期，一次查看满月、百日、周岁的公历、农历日期和星期，方便安排庆祝。
Bazi to Gregorian Calendar Converter
公历日期与八字四柱双向转换工具，支持紫微派与子平派子时规则，用于命理推算与历法对照。
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.
SHAKE Hash Generator
Variable-length hash generator for SHAKE-128/256, featuring salt support, multiple iterations, and various input/output formats.
Baby 100 Days Calculator
输入宝宝出生日期，一次查看满月、百日、周岁的公历、农历日期和星期，方便安排庆祝。
Bazi to Gregorian Calendar Converter
公历日期与八字四柱双向转换工具，支持紫微派与子平派子时规则，用于命理推算与历法对照。
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.
Tired of missing traditional solar terms? This tool uses astronomical calendar data to accurately calculate the time difference between the current time and the exact moment of Liqiu (Start of Autumn). It displays the remaining days, hours, minutes, and seconds in real time. Liqiu is the iconic node marking the beginning of autumn in the 24 Chinese solar terms, occurring annually on August 7th or 8th of the Gregorian calendar. This tool counts down based on the precise times published by the Purple Mountain Observatory of the Chinese Academy of Sciences.
Is the countdown accurate?
Yes, highly accurate. This tool uses the precise astronomically calculated moment of Liqiu, with a margin of error of less than 1 second.
Why does the exact time of the first day of fall change every year?
Liqiu is determined when the sun reaches the celestial longitude of 135°. Because the Earth's orbital period is not an exact number of days, the exact moment of Liqiu varies slightly each year, typically falling on August 7th or 8th.
Please ensure your device's system time is set correctly, as incorrect settings will affect the countdown's accuracy. The results provided by this tool are for reference only; official observatory data shall prevail.
The calculation of the Liqiu moment is based on the sun's celestial longitude. We recommend agricultural practitioners monitor the countdown and schedule farming activities according to local climate characteristics. For example, the exact time of Liqiu in 2025 is August 7th at 13:50:52. During this period, rice in the Yangtze River basin is in the heading stage, requiring careful field water management.
