How accurate is a birth-year match?

It uses one pillar of four (the year animal and its sound element), so it is a quick guide. A real reading compares both full charts.

Should a clashing pair not get married?

No. A clash shows where two people need more patience with each other, not whether the relationship can work.

Pick the previous lunar year. For example, 20 January 1995 is before Lunar New Year on 31 January 1995, so it counts as 1994, the Dog.

How accurate is a birth-year match?: It uses one pillar of four (the year animal and its sound element), so it is a quick guide. A real reading compares both full charts.
Should a clashing pair not get married?: No. A clash shows where two people need more patience with each other, not whether the relationship can work.
I was born before Lunar New Year. Which year do I pick?: Pick the previous lunar year. For example, 20 January 1995 is before Lunar New Year on 31 January 1995, so it counts as 1994, the Dog.