Precise Astronomical Data

24 Solar Terms Calendar for 2011
Vietnam (Hanoi)

Accurate 24 solar terms lookup table for 2011 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 2011 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: 2011
Spring •
Wood
Start of Spring
Beginning of spring, everything starts a new cycle
Friday, February 04, 2011 amt 11:32:59
Rain Water
Spring rain appears, humidity increases, trees turn green
Saturday, February 19, 2011 amt 07:25:28
Awakening of Insects
Insects wake up, spring thunder echoes through the sky
Sunday, March 06, 2011 amt 05:29:56
Spring Equinox
Middle of spring, day and night are equal in length
Monday, March 21, 2011 amt 06:20:45
Pure Brightness
Clear and bright weather, time to visit ancestral tombs
Tuesday, April 05, 2011 amt 10:11:44
Grain Rain
Rain facilitates the growth of cereal crops
Wednesday, April 20, 2011 pmt 17:17:17
Summer •
Fire
Start of Summer
Beginning of summer, temperature rises rapidly
Friday, May 06, 2011 amt 03:22:48
Grain Bud
Grains start to fill but are not yet ripe
Saturday, May 21, 2011 pmt 16:20:58
Grain in Ear
Grains begin to ear, busy time for planting
Monday, June 06, 2011 amt 07:27:00
Summer Solstice
Peak of summer, the longest day of the year
Wednesday, June 22, 2011 amt 00:16:24
Minor Heat
Weather starts to get sweltering but not at its peak yet
Thursday, July 07, 2011 pmt 17:41:56
Major Heat
Extremely hot weather, the hottest period of the year
Saturday, July 23, 2011 amt 11:11:57
Autumn •
Metal
Start of Autumn
Beginning of autumn, air becomes cool and pleasant
Monday, August 08, 2011 amt 03:33:33
End of Heat
Heat gradually ends, summer heat recedes
Tuesday, August 23, 2011 pmt 18:20:46
White Dew
White dew appears, nights start to get chilly
Thursday, September 08, 2011 amt 06:34:16
Autumnal Equinox
Middle of autumn, day and night are equal in length
Friday, September 23, 2011 pmt 16:04:43
Cold Dew
Cold dew, signaling that winter is approaching
Saturday, October 08, 2011 pmt 22:19:07
Frost Descent
Frost descends, temperature drops significantly
Monday, October 24, 2011 amt 01:30:31
Winter •
Water
Start of Winter
Beginning of winter, everything turns to rest
Tuesday, November 08, 2011 amt 01:35:09
Minor Snow
Light snow starts to fall in northern regions
Tuesday, November 22, 2011 pmt 23:08:11
Major Snow
Heavy snow, climate becomes very cold
Wednesday, December 07, 2011 pmt 18:29:22
Winter Solstice
Peak of winter, the longest night of the year
Thursday, December 22, 2011 pmt 12:30:21
Minor Cold
Slight cold weather, beginning of the freezing phase
Wednesday, January 05, 2011 pmt 23:54:40
Major Cold
Extreme cold, the coldest period of the year
Thursday, January 20, 2011 pmt 17:18:36

View solar terms for other years in Vietnam (Hanoi)

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View solar terms for 2011 in other regions

📍 Singapore 2011 📍 Malaysia (Kuala Lumpur) 2011 📍 China (Beijing) 2011

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

Select a location on the map for fastest results. Use city search if map selection is imprecise.

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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