Tinh Menh Do
Precise Astronomical Data

24 Solar Terms Calendar for 2009
Vietnam (Hanoi)

Accurate 24 solar terms lookup table for 2009 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 2009 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: 2009
Spring •
Wood
Minor Snow
Light snow begins to fall in northern regions
Tuesday, February 03, 2009 pmt 23:50:13
Major Snow
Snow falls heavily, the climate becomes very cold
Wednesday, February 18, 2009 pmt 19:46:33
Winter Solstice
Peak of winter, the longest night of the entire year
Thursday, March 05, 2009 pmt 17:48:01
Minor Cold
The weather is slightly cold, entering the stage of severe cold
Friday, March 20, 2009 pmt 18:43:56
Major Cold
The coldest period of the year, extreme winter chill
Saturday, April 04, 2009 pmt 22:34:06
Start of Spring
Spring begins, all things start a new cycle
Monday, April 20, 2009 amt 05:44:32
Summer •
Fire
Rain Water
Spring rain appears, humidity increases, plants turn green
Tuesday, May 05, 2009 pmt 15:51:05
Awakening of Insects
Insects awaken, spring thunder echoes across the sky
Thursday, May 21, 2009 amt 04:51:22
Spring Equinox
Mid-spring, day and night are equal in length
Friday, June 05, 2009 pmt 19:59:24
Pure Brightness
Bright and clear weather, time for honoring ancestors
Sunday, June 21, 2009 pmt 12:45:47
Grain Rain
Showers beneficial for the growth of cereal crops
Tuesday, July 07, 2009 amt 06:13:48
Start of Summer
Summer begins, temperature rises quickly, sun becomes harsh
Wednesday, July 22, 2009 pmt 23:36:04
Autumn •
Metal
Grain Bud
Grains begin to fill but are not yet fully ripe
Friday, August 07, 2009 pmt 16:01:24
Grain in Ear
Cereals blossom, a busy time for sowing and planting
Sunday, August 23, 2009 amt 06:38:57
Summer Solstice
Peak of summer, the longest day of the entire year
Monday, September 07, 2009 pmt 18:57:53
Minor Heat
The weather begins to be sultry but not yet at its hottest
Wednesday, September 23, 2009 amt 04:19:03
Major Heat
Extremely hot and sweltering weather, the hottest of the year
Thursday, October 08, 2009 amt 10:40:18
Start of Autumn
Autumn begins, the air becomes cool and pleasant
Friday, October 23, 2009 pmt 13:43:51
Winter •
Water
End of Heat
The heat gradually ends, summer heat retreats
Saturday, November 07, 2009 pmt 13:56:22
White Dew
White dew appears, nights begin to turn chilly
Sunday, November 22, 2009 amt 11:22:42
Autumnal Equinox
Mid-autumn, day and night are equal in length
Monday, December 07, 2009 amt 06:52:10
Cold Dew
Chilly mist and dew, signaling that winter is approaching
Tuesday, December 22, 2009 amt 00:46:44
Frost Descent
Frost forms, temperatures drop significantly
Monday, January 05, 2009 pmt 12:14:21
Start of Winter
Winter begins, all things transition into rest
Tuesday, January 20, 2009 amt 05:40:39

View solar terms for other years in Vietnam (Hanoi)

2004 2005 2006 2007 2008 2009 2010 2011 2012 2013 2014
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View solar terms for 2009 in other regions

📍 Singapore 2009 📍 Malaysia (Kuala Lumpur) 2009 📍 China (Beijing) 2009

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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