TCM Solar Terms
Traditional Chinese Medicine calendar integration for circadian optimization
Major Cold
大寒Coldest period of the year
Wake Light
6:30 AM
Color Temp
4000K
Intensity
70%
Duration
60 min
Aligned with seasonal sunrise patterns for optimal cortisol awakening response.
Peak Light
12:00 PM
Color Temp
5000K
Intensity
100%
Blue Light
Enhanced
Maximizes alertness and cognitive performance during peak activity hours.
Dim Start
5:00 PM
Color Temp
2800K
Intensity
40%
Blue Filter
Active
Promotes natural melatonin production aligned with seasonal sunset times.
Sleep early and rise late to preserve yang energy. Use warm-toned lighting in the bedroom for relaxation.
Eat warming foods like lamb, walnuts, and black sesame. Moderate supplementation strengthens constitution.
Exercise moderately and avoid excessive sweating. Indoor activities like tai chi and yoga are better.
Winter is for conserving energy. Increase indoor lighting brightness to combat winter blues.
Major Cold
大寒Coldest period of the year
Start of Spring
立春Beginning of spring
Rain Water
雨水Increasing rainfall
Awakening of Insects
驚蟄Hibernating creatures awaken
Spring Equinox
春分Day and night equal length
Clear and Bright
清明Clear and bright weather
Grain Rain
穀雨Rain helps grain grow
Start of Summer
立夏Beginning of summer
Grain Buds
小滿Grain begins to ripen
Grain in Ear
芒種Awned grains mature
Summer Solstice
夏至Longest day of the year
Minor Heat
小暑Moderately hot
Major Heat
大暑Hottest period
Start of Autumn
立秋Beginning of autumn
End of Heat
處暑Heat starts to subside
White Dew
白露Dew begins to form
Autumn Equinox
秋分Day and night equal
Cold Dew
寒露Dew becomes cold
Frost Descent
霜降Frost begins to appear
Start of Winter
立冬Beginning of winter
Minor Snow
小雪Light snow begins
Major Snow
大雪Heavy snow falls
Winter Solstice
冬至Shortest day of the year
Minor Cold
小寒Moderately cold