When does your Chinese year actually start?

Chinese New Year is a lunar date. It falls on the first day of the first lunar month, which is set by the moon, and that is why it wanders — anywhere from 21 January to 20 February.

The start of spring is a solar one. It is the moment the sun reaches a fixed point on its yearly path, which is why it barely moves at all: 3, 4 or 5 February, every year, and it has a time of day as well as a date.

The festival follows the moon. The chart follows the sun. Both are real, both are Chinese, and they are not measuring the same thing — which is the whole of the confusion, and the whole of the answer.

The same solar scheme runs through the rest of a chart, too. Months turn at their own solar points rather than on the 1st, which is why a chart’s month can change in the middle of a calendar one.

Far enough to matter, and not always in the same direction — some years the festival comes first, some years the start of spring does.

year   start of spring    Chinese New Year   gap
1990   4 Feb, 10:14       27 Jan             festival first, 8 days
2000   4 Feb, 20:40        5 Feb             spring first,   1 day
2024   4 Feb, 16:27       10 Feb             spring first,   6 days
2025   3 Feb, 22:10       29 Jan             festival first, 5 days
2026   4 Feb, 04:02       17 Feb             spring first,  13 days
2027   4 Feb, 09:46        6 Feb             spring first,   2 days

Take someone born on 30 January 1990. Chinese New Year that year was 27 January, so by the festival reckoning they arrived three days into the year of the Horse — and that is what they have been telling people ever since.

Here is what the engine computes for that birth, and for one six days later:

               year   month   day    hour
1990-01-30      己巳    丁丑    乙未    癸未
1990-02-05      庚午    戊寅    辛丑    乙未

And it runs the other way just as easily. In 2026 the start of spring came on 4 February while the festival waited until the 17th — so someone born on 10 February is, on their chart, already in the new year that the celebrations have not reached yet.

               year   month   day    hour
2026-02-10      丙午    庚寅    乙卯    癸未
2026-02-20      丙午    庚寅    乙丑    癸未

That second pair is the one worth sitting with. The festival passes between those two births and changes nothing in the year or month — because it was never the thing that moved them.

This is where most articles on the subject reach for the exciting answer, so here is the careful one: two different claims are getting bundled together.

The chart’s year pillar turns at the start of spring. That is not a matter of opinion or school — it follows from the chart being built on the solar year, and the tradition 明命｜MING reads from is not divided about it.

Whether your zodiac label should follow the chart or the festival is a naming convention, and usage genuinely differs. Almanacs, families and apps do not all answer it the same way, and someone who says “I am a Horse” because their family celebrated a Horse year is not making an error about their chart. They are using the word the way their household used it.

The reason to keep those apart: the label is the part that does no work. Nothing in a reading rests on which animal you call yourself. What does the work is the pillar — the pair of characters — and the elements it carries into the rest of the chart. A gap birth does not give you an interesting identity; it gives you a chart you should double-check.

For what it is worth, 明命｜MING is consistent about which one it uses. The year pillar turns at the start of spring, and the “your own sign comes round” marker in My Season fires on that same boundary — a marker, as it says on the page, and not a verdict.

It notices when you were born near one, and says so rather than pretending to a precision it does not have.

A birth within about a day of one of these solar boundaries is flagged automatically, and the confidence on everything the boundary governs — the year pillar, the month pillar, and the structural reading built on them — is lowered. The wording of the reading softens with it.

The reason is honest rather than cautious. The boundary is an astronomical instant with a time of day attached: in 2026 it was 04:02. A birth at breakfast that morning is on one side of it and a birth at midnight before is on the other, and if your recorded birth time is approximate then which side you fall on is approximate too. A tool that hands you a confident chart in that situation is not being more accurate — only quieter about the same uncertainty.

If you were born in late January or early February, look up the start of spring for your birth year specifically — not the general rule. It has a time of day, and in some years it lands on the 3rd or the 5th.

If two tools disagree, compare the eight characters, not the conclusions. If the year and month pairs differ, you have found a boundary, not a difference of opinion — and one of the two is simply wrong. Why two BaZi readings of the same chart disagree covers what to do when the charts match and the readings still differ.

And if you are asking a chatbot, this boundary is the single most common place its answer goes wrong — can ChatGPT or DeepSeek read your BaZi chart? shows what that costs.