Lixia occurs at celestial longitude 45°, around May 5-7. It marks the astronomical start of summer in the traditional almanac. Fire element strengthens; yang energy approaches its annual peak.
Tradition: weighing children to track growth, eating five-color rice, drinking herbal teas. Climate: temperatures rise notably; southern China enters the rainy season.
Long before Lixia was a line in an almanac, it was a court ritual. The Book of Rites (禮記 Lǐjì) describes the ruler leading his ministers out to the southern suburb to greet summer in the season's first month, dressed in red to match the fire phase then taking charge. The Yuan-dynasty compendium Yueling Qishi'er Hou Jijie (月令七十二候集解) glosses xia (夏) through the near-homophone jia (假), to borrow or to enlarge: what sprouted in spring now draws on the season's heat to expand in bulk. The emphasis falls on scale, not on a fresh start.
Treating Lixia as a weather announcement is the easiest slip to make. It is a position of the sun, not a temperature reading: northern China can still catch a late cold snap while the far south has been summery for weeks, and the genuinely hot weeks arrive with Xiaoshu and Dashu. A second slip imports it into the wrong system. Ziwei Doushu (紫微斗數 Purple Star astrology) places its stars by lunar month, day and double-hour and ignores solar terms entirely; only Bazi divides months at Lixia. The two calendars sit side by side in the same almanac and are not interchangeable.
In Four Pillars (八字 bāzì) practice Lixia is a sectional term (節 jie), which means it moves the month pillar. The instant the sun reaches 45 degrees of celestial longitude the month branch turns from chen (辰) to si (巳), with no transitional window, so two people born on the same calendar day can carry different month pillars. The si branch hides three stems, bing fire, wu earth and geng metal, so a chart rooted here draws on fire at strength, earth as residue and metal at its point of origin all at once. Anyone born near the boundary needs the exact minute for that year, not the usual date range.
Both the date and the length of the season come with two competing conventions. Before the Qing calendar reform, solar terms were spaced by equal intervals of time rather than equal arcs of ecliptic longitude, so a Lixia date cited from an older source may sit about a day away from a modern computation, and it is worth checking which convention a text used. There is also disagreement over how long summer runs: schools that carve out a separate long summer (長夏) and hand wei month to earth leave summer with three fire months, while others keep four. Settle which convention you are using before judging strength by the five phases.
Reading Lixia against its neighbours sharpens it. Guyu (穀雨 Grain Rain), just before, still belongs to moisture and soil feeding young shoots; at Lixia the initiative passes to fire. Xiaoman (小滿 Lesser Fullness), which follows, is a median term that does not shift the month pillar and only reports how far the same month has travelled. Liqiu (立秋 Beginning of Autumn) is Lixia's mirror, one opening the fire season and the other the metal season. Tradition also hands the eighteen days before each of the four beginnings to earth, which makes the tail of chen month the earthiest stretch of the year's first half.
The term subdivides into three pentads: mole crickets calling, earthworms surfacing, and the wang gua vine (王瓜, a trichosanthes) putting out runners. The choice is not arbitrary. One sign is taken from sound, one from below ground and one from above it, together marking heat and damp rising in step. These pentads were fixed against the middle and lower Yellow River valley, so they work best as a record of what one region's observers saw, not as a rule expected to hold in Guangzhou or Harbin. Read that way they rarely disappoint.
No. Lixia marks the sun reaching 45 degrees of celestial longitude, which the traditional calendar treats as the opening of summer. It is an astronomical position, not a forecast. Across China's range of latitudes the south is often already summery while the north can still see a cold spell, and the hottest weeks usually arrive later, around Xiaoshu and Dashu. Tradition reads the day as the point where yang energy takes the lead, not as the day heat begins.
It depends on the exact minute the term begins. Four Pillars changes the month pillar at a sectional term, so a birth before that instant still falls in chen month and one after it falls in si month. Because the changeover is timed to the minute, two people born on the same calendar date can end up with different month pillars, which is why borderline births need the actual solar-term time for that year rather than the printed date range.
Not by definition. Lixia is fixed by the sun's position, so it lands near May 5 every year in the Gregorian calendar. Duanwu, the Dragon Boat Festival, falls on the fifth day of the fifth lunar month and drifts across late May and June. Solar terms are the solar component of the Chinese lunisolar calendar and festivals largely the lunar component. They run as parallel tracks in the same almanac and coincide only by chance.
In parts of the lower Yangtze region, families hung a large steelyard from a beam, sat a child or an elder on a suspended stool, and recorded the weight on Lixia day, weighing again after autumn to see whether the summer had worn the person down. Auspicious phrases were chanted and unlucky numbers avoided. It expresses a traditional concern about summer depletion and is a folk practice, not a divination technique or a way of reading a chart.
Generally no. Purple Star astrology places its palaces and stars using the lunar year, month, day and double-hour, taking the lunar month directly without reference to solar terms. It is Bazi that divides months at sectional terms, with Lixia opening si month. Applying the solar-term rule to a Ziwei chart shifts the starting palace, so the chart is misaligned from its first step. The two systems' calendar inputs should be kept apart.