Precise Astronomical Data

24 Solar Terms Calendar for 1805
Vietnam (Hanoi)

Accurate 24 solar terms lookup table for 1805 in Vietnam (Hanoi) (Asia/Ho_Chi_Minh). Data includes start dates and times for solar terms from Lichun to Dahan, calculated using modern astronomical algorithms to help users identify key time markers for agriculture, feng shui, and daily life.

In Vietnam (Hanoi): solar terms are calculated according to the Asia/Ho_Chi_Minh timezone. Tinh Menh Do has adjusted errors based on the center coordinates 21.0285, 105.8542 to ensure the most accurate results for this region.

When do the 24 Solar Terms of 1805 begin?

"The 24 solar terms system reflects the movement of the sun, serving as a guide for agriculture, health, and spiritual life in the East. It is also the basis for many metaphysical calculations."

Location: Asia/Ho_Chi_Minh (21.02850, 105.85420) • Year: 1805
Spring •
Wood
Start of Spring
Beginning of spring, everything starts a new cycle
Monday, February 04, 1805 amt 11:26:45
Rain Water
Spring rain appears, humidity increases, trees turn green
Tuesday, February 19, 1805 amt 07:49:29
Awakening of Insects
Insects wake up, spring thunder echoes through the sky
Wednesday, March 06, 1805 amt 06:26:43
Spring Equinox
Middle of spring, day and night are equal in length
Thursday, March 21, 1805 amt 08:04:00
Pure Brightness
Clear and bright weather, time to visit ancestral tombs
Friday, April 05, 1805 pmt 12:39:06
Grain Rain
Rain facilitates the growth of cereal crops
Saturday, April 20, 1805 pmt 20:35:38
Summer •
Fire
Start of Summer
Beginning of summer, temperature rises rapidly
Monday, May 06, 1805 amt 07:24:18
Grain Bud
Grains start to fill but are not yet ripe
Tuesday, May 21, 1805 pmt 21:04:03
Grain in Ear
Grains begin to ear, busy time for planting
Thursday, June 06, 1805 pmt 12:39:53
Summer Solstice
Peak of summer, the longest day of the year
Saturday, June 22, 1805 amt 05:49:15
Minor Heat
Weather starts to get sweltering but not at its peak yet
Sunday, July 07, 1805 pmt 23:22:37
Major Heat
Extremely hot weather, the hottest period of the year
Tuesday, July 23, 1805 pmt 16:45:11
Autumn •
Metal
Start of Autumn
Beginning of autumn, air becomes cool and pleasant
Thursday, August 08, 1805 amt 08:51:08
End of Heat
Heat gradually ends, summer heat recedes
Friday, August 23, 1805 pmt 23:06:24
White Dew
White dew appears, nights start to get chilly
Sunday, September 08, 1805 amt 10:46:01
Autumnal Equinox
Middle of autumn, day and night are equal in length
Monday, September 23, 1805 pmt 19:29:08
Cold Dew
Cold dew, signaling that winter is approaching
Wednesday, October 09, 1805 amt 01:01:08
Frost Descent
Frost descends, temperature drops significantly
Thursday, October 24, 1805 amt 03:22:03
Winter •
Water
Start of Winter
Beginning of winter, everything turns to rest
Friday, November 08, 1805 amt 02:47:35
Minor Snow
Light snow starts to fall in northern regions
Friday, November 22, 1805 pmt 23:39:09
Major Snow
Heavy snow, climate becomes very cold
Saturday, December 07, 1805 pmt 18:35:19
Winter Solstice
Peak of winter, the longest night of the year
Sunday, December 22, 1805 pmt 12:13:08
Minor Cold
Slight cold weather, beginning of the freezing phase
Saturday, January 05, 1805 pmt 23:28:38
Major Cold
Extreme cold, the coldest period of the year
Sunday, January 20, 1805 pmt 16:59:53

View solar terms for other years in Vietnam (Hanoi)

1800 1801 1802 1803 1804 1805 1806 1807 1808 1809 1810
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View solar terms for 1805 in other regions

📍 Singapore 1805 📍 Malaysia (Kuala Lumpur) 1805 📍 China (Beijing) 1805

Why is accurate solar terms calculation important?

"Years pass by, solar terms rotate - The foundation of East Asian calendar"

Astronomical Principle

Solar Orbit

The 24 solar terms are determined based on Earth's position on its orbit around the Sun (Ecliptic). The entire 360° circle is divided into 24 equal segments of 15° each.

  • Solar system: Solar terms are actually a solar calendar, fixed to the sun's position.
  • Reference point: Starts from Lichun (315°) or Vernal Equinox (0°).
  • Cycle: Each solar term lasts about 15 days.
Practical Significance

Natural Rhythm

The names of the solar terms reflect the actual changes in climate, weather, and phenology throughout the year, guiding agricultural cultivation and daily life.

  • Subtle observation: Detailed divisions of phases: rain (Yushui), insects awakening (Jingzhe), dew (Bailu)...
  • Metaphysics: Solar terms are the foundation for determining the Can Chi calendar in Eastern metaphysics.
  • Health cultivation: Guidelines for a lifestyle in harmony with the rhythm of nature.
Digital Technology

Precise Calculation

Combines a modern astronomical algorithm (Astronomy Engine) with digital geographic data to provide absolute accuracy.

  • Solar Time (Apparent Solar Time): Calculated based on actual longitude, not just administrative time zones.
  • Multi-platform: Standardized data for any location globally.
  • AI Integration: Analysis and forecasting based on historical and astronomical data.

How to view the solar terms calendar for other years?

View solar terms for other years in Vietnam (Hanoi) (Default location) or re-select another location on the map and search box

Solar Terms Lookup

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Additional Information

What is different about solar term times in Vietnam (Hanoi)?

Due to differences in longitude and time zones (Asia/Ho_Chi_Minh), the start time of solar terms in Vietnam (Hanoi) will differ from Vietnam or International UTC time. The data table above has been accurately converted to local time for easy lookup and application.

Data Accuracy

Data is calculated using algorithms that ensure high accuracy down to the minute for the period from 1950 to 2049.

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