Monthly virtue (月德)

A Korean folk custom used when choosing dates for moving or major events.

A day matching one of twelve day pillars listed in the lower volume of Seontaek Giyo for grave relocation, grave opening, grave maintenance and setting memorial stones.

A day matching one of seven day pillars listed in the lower volume of Seontaek Giyo for date selection across various activities.

A day matching one of ten day pillars listed in the lower volume of Seontaek Giyo for the same date-selection purposes as heaven-deaf days.

A traditional name for each date, such as 甲子 or 乙丑. It combines two sets of symbols called stems and branches and repeats every 60 days.

A traditional system that gives each day one of twelve names, such as establish, remove or full. The name comes from comparing the month and day branches.

A traditional date-selection classification of twelve day spirits, including Azure Dragon and Bright Hall, into six auspicious yellow-path spirits and six inauspicious black-path spirits. The solar-term month and day branches determine the spirit.

A month that changes at solar terms such as the start of spring, rather than on the first day of a lunar month. It is used with the day’s traditional name to calculate date-selection information.

旺, 相, 休, 囚 and 死 are traditional terms for phase relationships between a day and a month. The current app does not score this relationship separately in overall grades or purpose-specific date selection.

Yellow path · 黃道 · Xieji Bianfang Shu

Black path · 黑道 · Xieji Bianfang Shu

Month break · 月破 · Hyeopgil Tongui

Heavenly virtue · 天德 · Xieji Bianfang Shu

Heavenly pardon · 天赦 · Xieji Bianfang Shu

Moving · Verified date conditions in Seontaek Giyo form the primary references. The listed cross-check sources are checked separately for this activity. Concurrent yi and ji are preserved. Only verified public-calendar conditions are applied; activity references do not change the overall score. Month rules change on KST solar-term dates; monthly taboo days use lunar days 5, 14 and 23.

Marriage · Verified date conditions in Seontaek Giyo form the primary references. The listed cross-check sources are checked separately for this activity. Concurrent yi and ji are preserved. Only verified public-calendar conditions are applied; activity references do not change the overall score. Month rules change on KST solar-term dates; monthly taboo days use lunar days 5, 14 and 23.

Commerce and trade · Verified date conditions in Seontaek Giyo form the primary references. The listed cross-check sources are checked separately for this activity. Concurrent yi and ji are preserved. Only verified public-calendar conditions are applied; activity references do not change the overall score. Month rules change on KST solar-term dates; monthly taboo days use lunar days 5, 14 and 23.

Documents and transactions · Verified date conditions in Seontaek Giyo form the primary references. The listed cross-check sources are checked separately for this activity. Concurrent yi and ji are preserved. Only verified public-calendar conditions are applied; activity references do not change the overall score. Month rules change on KST solar-term dates; monthly taboo days use lunar days 5, 14 and 23.

Burial · Verified date conditions in Seontaek Giyo form the primary references. The listed cross-check sources are checked separately for this activity. Concurrent yi and ji are preserved. Only verified public-calendar conditions are applied; activity references do not change the overall score. Month rules change on KST solar-term dates; monthly taboo days use lunar days 5, 14 and 23.

Ritual · Verified date conditions in Seontaek Giyo form the primary references. The listed cross-check sources are checked separately for this activity. Concurrent yi and ji are preserved. Only verified public-calendar conditions are applied; activity references do not change the overall score. Month rules change on KST solar-term dates; monthly taboo days use lunar days 5, 14 and 23.

Grave relocation and repair · Verified date conditions in Seontaek Giyo form the primary references. The listed cross-check sources are checked separately for this activity. Concurrent yi and ji are preserved. Only verified public-calendar conditions are applied; activity references do not change the overall score. Month rules change on KST solar-term dates; monthly taboo days use lunar days 5, 14 and 23.