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Calculate the exact real-time countdown to the Major Cold solar term and explore traditional Chinese calendar culture.
Overview
Understand what the tool solves, how it works, and the boundaries of its data.
Dahan, also called Major Cold or Severe Cold, is one of the 24 traditional Chinese solar terms. The Hong Kong Observatory places it at 300° solar longitude, between Moderate Cold at 285° and Spring Commences at 315°. “Major Cold” is a calendar name: this countdown does not predict temperatures, snow, or local winter weather.
Because the term is defined by the Sun’s position, its Gregorian date and clock time can vary from year to year. Treat the chosen year’s transition as the event to check; do not reuse a date or time from a past calendar.
The page shows a selected year, the Dahan date, a lunar-calendar date, and the remaining days, hours, minutes, and seconds. The countdown compares the target moment with the current time reported by your device. It refreshes the displayed interval once per second; that display cadence is not a claim of astronomical or clock precision.
The year selector lets you inspect another year. The page initially advances to the next occurrence when the current year’s event has already passed. The term selector links to other solar-term countdown pages. The calendar action can add the displayed event to a calendar, and the page also provides sharing.
Guide
Follow the workflow and verify inputs and outputs with practical examples.
Read the year beside the solar-term name. Use the year control to inspect a different occurrence, especially when planning an event well ahead.
The date line gives the selected Dahan date, while the counters divide the remaining interval into days, hours, minutes, and seconds. The lunar date is a separate calendar label; use the Gregorian date and local time context when scheduling.
Use the calendar option to save the displayed event, or choose another solar term to view its page. When comparing a printed almanac with this countdown, make sure both refer to the same year and time zone.
Use cases
See how the tool fits into real work and everyday tasks.
Looking ahead to Dahan for a family observance? Check the year and event time, then add the event to your calendar so it is not confused with a recurring fixed-date holiday.
Use the 300° solar-longitude marker to explain why a solar term is tied to the Sun’s apparent annual position and why the civil date may shift between years.
For a remote gathering, compare the displayed event with an authoritative calendar for the participants’ location. Share one agreed local start time rather than forwarding a countdown value without its time-zone context.
Q&A
Find concise answers to common questions and confusing cases.
No. Its date and time can vary by year because the term is determined by solar longitude, not by a fixed Gregorian date.
Check whether the two calendars use different time zones. Hong Kong Observatory tables use Hong Kong time (UTC+8); this page reads the device’s current time and has no time-zone selector.
The page marks the event as passed and offers a control to advance to the following year. You can also select a different solar term.
Notes
Review scope, result limitations, and important precautions before use.
This countdown uses your device’s clock and local time-zone settings, and the page does not offer a time-zone switch. An incorrect device clock or zone can change the countdown and the displayed civil date. When a precise event time matters, compare it with an authoritative calendar for the location you have in mind. A once-per-second screen update does not guarantee second-level accuracy.
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